Posted on by Jason Major

Will This Be The Fate Of The Earth?

Artist's impression of PG0843+516, a white dwarf star surrounded by Earthlike planetary remains. (© Mark A. Garlick / space-art.co.uk / University of Warwick)

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Astronomers have found four nearby white dwarf stars surrounded by disks of material that could be the remains of rocky planets much like Earth — and one star in particular appears to be in the act of swallowing up what’s left of an Earthlike planet’s core.

The research, announced today by the Royal Astronomical Society, gives a chilling look at the eventual fate that may await our own planet.

Astronomers from the University of Warwick used Hubble to identify the composition of four white dwarfs’ atmospheres, found during a survey of over 80 such stars located within 100 light-years of the Sun. What they found was a majority of the material was composed of elements found in our own Solar System: oxygen, magnesium, silicon and iron. Together these elements make up 93% of our planet.

In addition, a curiously low ratio of carbon was identified, indicating that rocky planets were at one time in orbit around the stars.

Since white dwarfs are the leftover cores of stellar-mass stars that have burnt through all their fuel, the material in their atmosphere is likely the leftover bits of planets. Once held in safe, stable orbits, when their stars neared the ends of their lives they expanded, possibly engulfing the innermost planets and disrupting the orbits of others, triggering a runaway collision effect that eventually shattered them all, forming an orbiting cloud of debris.

This could very well be what happens to our Solar System in four or five billion years.

“What we are seeing today in these white dwarfs several hundred light years away could well be a snapshot of the very distant future of the Earth,” said Professor Boris Gänsicke of the Department of Physics at the University of Warwick, who led the study. “During the transformation of the Sun into a white dwarf, it will lose a large amount of mass, and all the planets will move further out. This may destabilise the orbits and lead to collisions between planetary bodies as happened in the unstable early days of our solar systems.”

Three easy steps to planetary destruction. (© Mark A. Garlick / space-art.co.uk / University of Warwick)

One of the white dwarfs studied, labeled PG0843+516, may even be actively eating the remains of an once-Earthlike world’s core.

The researchers identified an abundance of heavier elements like iron, nickel and sulphur in the atmosphere surrounding PG0843+516. These elements are found in the cores of terrestrial planets, having sunk into their interiors during the early stages of planetary formation. Finding them out in the open attests to the destruction of a rocky world like ours.

Of course, being heavier elements, they will be the first to be accreted  by their star.

“It is entirely feasible that in PG0843+516 we see the accretion of such fragments made from the core material of what was once a terrestrial exoplanet,” Prof. Gänsicke said.

It’s an eerie look into a distant future, when Earth and the inner planets could become just some elements in a cloud.

Read the full story on the RAS site here.

 

Posted on by Jason Major

ESA Turns On The JUICE For New Jupiter Mission

Galileo image of Ganymede, Jupiter's - and the Solar System's - largest moon. (Ted Stryk)

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The European Space Agency has given the go-ahead for an exciting mission to explore the icy moons of Jupiter, as well as the giant planet itself.

JUICE — JUpiter ICy moons Explorer — will consist of a solar-powered spacecraft that will spend 3.5 years within the Jovian system, investigating Ganymede, Europa and the upper atmosphere of Jupiter. Anticipated to launch in June 2022, JUICE would arrive at Jupiter in early 2030.

As its name implies, JUICE’s main targets are Jupiter’s largest icy moons — Ganymede and Europa — which are thought to have liquid oceans concealed beneath their frozen surfaces.

The largest moon in the Solar System, Ganymede is also thought to have a molten iron core generating a magnetic field much like Earth’s. The internal heat from this core may help keep Ganymede’s underground ocean liquid, but the dynamics of how it all works are not quite understood.

JUICE will also study the ice-coated Europa, whose cueball-smooth surface lined with cracks and jumbled mounds of frozen material seem to be sure indicators of a subsurface ocean, although how deep and how extensive is might be are still unknown — not to mention its composition and whether or not it could be hospitable to life.

The rust-colored cracks lining Europa's otherwise smooth surface hint at a subsurface ocean. (Ted Stryk)

“JUICE will give us better insight into how gas giants and their orbiting worlds form, and their potential for hosting life,” said Professor Alvaro Giménez Cañete, ESA’s Director of Science and Robotic Exploration.

The JUICE spacecraft was originally supposed to join a NASA mission dedicated to the investigation of Europa, but NASA deemed their proposed mission too costly and it was cancelled. According to Robert Pappalardo, study scientist for the Europa mission based at JPL, NASA may still supply some instruments for the spacecraft “assuming that the funding situation in the United States can bear it.”

Artist's rendering of JUICE at Jupiter. (ESA/AOES)

JUICE will also capture images of Jupiter’s moon Callisto and search for aurorae in the gas giant’s upper atmosphere, as well as measure the planet’s powerful magnetic field. Once arriving in 2030, it will spend at least three years exploring the Jovian worlds.

Read more in today’s news release from Nature, and stay tuned to ESA’s JUICE mission page here.

Recalibrated Galileo images © Ted Stryk. See more of Ted’s excellent work on his site Planetary Images From Then And Now.

Posted on by Jason Major

OMG Space

OMG Space attempts to portray the scale sizes and distances in the Solar System

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“You may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.” – Douglas Adams

Standard classroom models and textbook illustrations of the Solar System, regardless of how pretty they are, all share one thing in common: they’re wrong. Ok, maybe not wrong, but definitely inaccurate… especially in regards to scale. And understandably so, as it’s nearly impossible to portray in a convenient manner the sheer amount of space there is between the planets and their relative sizes. Even if a model manages to show one or the other in a straightforward, linear fashion, it usually doesn’t show both.

This one does.

OMG Space is a web page made by Margot Trudell as graphic design thesis project at Toronto’s OCAD University. Displayed on the Visual.ly portfolio site, Margot’s expansive infographic shows the Sun, planets and some minor bodies to scale, both in terms of relative size and distance. By clicking on a planet’s name at the bottom of the page you’ll be whisked away toward it, giving a sense of how very far it really is between the many worlds that make up our own little Solar System.

And if that’s not enough, Margot has included a descriptive chart for each world that gives basic information on distance from the Sun, orbital period and moon count as well as details on visiting exploration missions — past, present and planned. These can be accessed by clicking on the respective worlds once you arrive.

Each planet has an infographic associated with it, showing physical characteristics and exploration timelines. (M. Trudell)

“I created the infographics first and as I worked on them decided they needed more context, and the idea of creating a to scale version of our solar system came to mind,” Margot told Universe Today. “The project was initially intended to be all print, but knowing the real scale of our solar system I eventually came up with the idea of using the infiniteness of the web to my advantage.”

If you watch the scroll bar on the right side of the page (and I do suggest resizing the page to fill your screen as much as possible) you’ll also get a sense of how much space you’re traversing as you zip between worlds. And that’s just taking into consideration the average distances between each planet at opposition. In reality, they’re never lined up in a row like that!

If you’re so inclined you can also scroll up and down manually… if only to see how long it takes you to not get anywhere.

“My favourite thing to do on OMG Space’s website is go to Earth and then click on the link to the Moon,” Margot said. “The small distance you move yet the big gap you see… it gives you a whole new perspective on how far people traveled to get to the moon and back, and it shows how far the moon really is from Earth (I feel that it’s always portrayed as being almost right beside us) and makes you consider how powerful those rockets must have been to get us that far.

“It gives you a bit of that ‘OMG’ feeling that the project is named for.”

Yes, OMG indeed.

Infographics by Margot Trudell. See more of Margot’s work here.

Posted on by Jason Major

Cassini Exposes Phoebe As More Planet Than Moon

Color-composite image of Phoebe as seen by Cassini in 2009.

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Saturn’s curious moon Phoebe features a heavily-cratered shape and orbits the ringed planet backwards at a considerable distance of over 8 million miles (12.8 million km). According to recent news from the Cassini mission Phoebe may actually be a Kuiper Belt object, having more in common with planets than it does with any of Saturn’s other satellites.

132 miles (212 km) in diameter, Phoebe is the largest of Saturn’s irregular moons — a cloud of small, rocky worlds held in distant orbits at highly inclined paths. Its backwards (retrograde) motion around Saturn and dense composition are dead giveaways that it didn’t form in situ within the Saturnian system, but rather was captured at some point when it strayed too close to the gas giant.

In fact it’s now thought that Phoebe may be a remnant from the formation of the Solar System — a planetesimal — with its own unique history predating its adoption into Saturn’s extended family of moons.

“Unlike primitive bodies such as comets, Phoebe appears to have actively evolved for a time before it stalled out,” said Julie Castillo-Rogez, a planetary scientist at NASA’s Jet Propulsion Laboratory. “Objects like Phoebe are thought to have condensed very quickly. Hence, they represent building blocks of planets. They give scientists clues about what conditions were like around the time of the birth of planets and their moons.”

Although Phoebe is heavily eroded and irregularly-shaped today at one time it may have been much rounder. But an early composition of radioactive elements would have generated heat, and as it warmed it “deflated” through compression, growing denser and denser.

Map of Phoebe's surface. (NASA/JPL-Caltech/SSI/Cornel)

Now, Phoebe exhibits a similar density to Pluto — another denizen of the Kuiper Belt.

At some point Phoebe may even have had water, kept liquid by its radioactive heat. That is, until the heat faded and it froze, creating the icy surface detected by Cassini’s instruments.

Still, Cassini’s study of Saturn’s moons has provided scientists with clues to what was happening much earlier on in the Solar System. What caused Phoebe to drift inwards to be caught up in orbit around Saturn? How did it survive such a supposed shuffling of planets and other worlds did not? As Cassini continues its investigation answers — and undoubtedly even more questions — will be uncovered.

Read more on NASA’s news release here.

Image: NASA/JPL/SSI. Color composition by Gordan Ugarkovic.

Posted on by Ken Kremer

Outer Space – Mind Blowing Video from Jupiter and Saturn

Video Caption: This mesmerizing video unveils incredibly amazing sequences around Jupiter and Saturn from NASA’s Cassini and Voyager missions set to stirring music by “The Cinematic Orchestra -That Home (Instrumental)”. Credit: Sander van den Berg

Don’t hesitate 1 moment ! Look and listen to this mind blowing video of the Jupiter and Saturnian systems.

If you love the wonders of the hitherto unknown Universe unveiled before your eyes – and long to explore – feast your eyes on this short new video right now titled simply; “Outer Space”. Continue reading “Outer Space – Mind Blowing Video from Jupiter and Saturn”

Posted on by Ken Kremer

Discovery Enters Eternal Smithsonian Home as Historic Relic

Discovery and Enterprise rest nose-to-nose at ceremony transferring ownership of Discovery from NASA to the Smithsonian National Air & Space Museum on April 19, 2012. The official deed transfer ceremony took place at the Steven F. Udvar-Hazy Center in Chantilly, Virginia. Credit: Ken Kremer

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Space Shuttle Discovery, the longest serving and most flown spaceship in human history, entered her eternal home today, Thursday, April 19, at the Smithsonian’s National Air & Space Museum Annex in Virginia.

Discovery thereby assumed her new status as a museum relic and monument to the promise and glorious dreams of space exploration, inspiring future generations of explorers to reach far beyond their grasp and accomplish the unthinkable. That’s what space and science are all about.

The space shuttle program and all three of NASA’s winged spaceships were forcibly retired by politicians at the conclusion of the final shuttle mission, STS-135, in July 2011 which left America with no means to launch our own astronauts into space and to the International Space Station.

Shuttle astronauts march with Discovery being towed from Dulles to the Smithsonian’s Udvar Hazy Center on April 19, 2012. Credit: Ken Kremer

Discovery officially became the property of the Smithsonian Museum when NASA Administrator Charles Bolden signed the title of ownership over from NASA to the world renowned museum at a public ceremony held today at the Smithsonian’s Steven F. Udvar-Hazy Center in Chantilly, Virginia.

“Today, while we look back at Discovery’s amazing legacy, I also want to look forward to what she and the shuttle fleet helped to make possible,” said NASA Administrator Charles Bolden. “As NASA transfers the shuttle orbiters to museums across the country, we are embarked on an exciting new space exploration journey. Relying on American ingenuity and know-how, NASA is partnering with private industry to provide crew and cargo transportation to the International Space Station, while developing the most powerful rocket ever built to take the nation farther than ever before into the solar system.”

National Air and Space Museum Director, General John “Jack” Dailey said, “Discovery has distinguished itself as the champion of America’s shuttle fleet. In its new home, it will shine as an American icon, educating and inspiring people of all ages for generations to come. The Museum is committed to teaching and inspiring youngsters, so that they will climb the ladder of academic success and choose professions that will help America be competitive and successful in the world of tomorrow.”

Bolden and Dailey signed the transfer documents in front of the huge crowd who came to celebrate Discovery’s arrival.

Shuttle astronauts march with Discovery being towed from Dulles to the Smithsonian’s Udvar Hazy Center on April 19, 2012. Credit: Ken Kremer

The official handover ceremony was witnessed by a prestigious gathering of some three dozen astronauts including more than a dozen men and women who served as Commanders of Space Shuttle Discovery and Senator and Astronaut John Glenn, the first American to orbit the Earth 50 years ago in 1962.

Glenn flew to space for the 2nd time aboard Discovery as a payload specialist in 1998 at the age of 77. He is the oldest person to fly in space.

Shuttle astronauts march with Discovery being towed to the Smithsonian’s Udvar-Hazy Center and official Welcome ceremony on April 19, 2012. Credit: Ken Kremer

And the general public showed their enthusiastic support for NASA and space exploration by attending in the thousands and staying all day for the dozens of activity stations, presentations and displays organized by NASA and the Smithsonian and its donors.

Glenn made clear his disagreement with the end of NASA’s shuttle program.

Discovery arrives at her final resting place in the Smithsonian on April 19, 2012. Credit: Ken Kremer

To make way for Discovery, Space Shuttle Enterprise was first towed out a huge rear door of the museum early this morning. Discovery and Enterprise then met nose to nose as the dramatic backdrop for the official welcoming ceremony.

Late this afternoon, Discovery was towed to her final resting place into the museum to the exact spot formerly held by Enterprise, which had been on display at the Virginia facility since 2003.

Altogether, Discovery flew 39 missions and spent a full year (365 days) in space, orbited Earth 5,830 times and traveled 148,221,675 miles during a space flight career spanning 27 years.

Discovery flew its maiden voyage on Aug. 30, 1984 and blasted off on her final voyage on Feb. 24, 2011. The STS-133 mission was the final flight for the illustrious orbiter which landed at the Kennedy Space Center on March 9, 2012.

Discovery deployed the iconic Hubble Space Telescope to orbit, one of the premier science instruments built by humankind. Discovery delivered many other science payloads to orbit and also to explore the solar system, including the Ulysses solar probe.

The winged spaceship was NASA’s fleet leading orbiter and played a significant role in building the International Space Station and visiting the Russian Mir Space Station.

Posted on by Ken Kremer

Demating Discovery for Smithsonian Welcome

Demating of Discovery from Shuttle Carrier Aircraft at Dulles Airport. Credit: NASA

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Following Discovery’s triumphant final flight from her Florida Spaceport home and victory lap tour above the skies of Washington D.C. – piggybacked atop a 747 Jumbo Jet – she landed at her permanent new home at the Smithsonian’s Virginia annex on April 17 and the dynamic duo taxied off the Dulles Airport runway to a temporary parking spot off to the side.

Tonight, Discovery is being demated from the Shuttle Carrier Aircraft, designated NASA 905.

Discovery awaits Demating after landing at Dulles Airport on April 17, 2012 and as numerous aircraft fly by for landing descent. Discovery sits atop modified Boeing 747 carrier jet. Hoisting cranes at left.
Credit: Ken Kremer

As Discovery awaited demating off to the side of a Dulles runway, numerous jets have descended right past – with some lucky passengers catching a birds eye glimpse of that remarkable sight of Discovery sitting atop a 747 jet.

A pair of rented monstrous cranes at front and back will hoist Discovery – weighing around 166,000 pounds – off the jets rear and three unbolted attach points. The 747 will then be backed out, Discovery’s landing gear and wheels will be extended and the cranes will gently lower NASA’s most experienced shuttle orbiter to the ground in a delicate and rarely performed ballet.

Demating cranes, Discovery and NASA 905 Jumbo Jet at Dulles Airport on April 17, 2012.
Credit: Ken Kremer

A small crew of the few remaining shuttle workers has meticulously prepared the Dulles airport site over the past few weeks, drilled stabilizing holes into the tarmac and assembled the Demag cranes which stem from a company in New Jersey and were specially flown in from a Canadian worksite.

NASA’s fleet leading orbiter will then be towed a short distance to her permanent new home at the Smithsonian National Air and Space Museum’s Steven F. Udvar-Hazy Center in Chantilly, Virginia.

The public is invited to attend the Smithsonian’s “Welcome Discovery Day Celebration” on Thursday, April 19 to witness the final leg of Discovery’s trip, being towed inside. The museum doors open at 8 a.m. sharp.

Those who attend the Smithsonian’s April 19 festivities will be treated to a once in a lifetime view of a shuttle shuffle and two space shuttles – Discovery and Enterprise -poised nose to nose for about 4 hours.

Space Shuttle Enterprise is being towed out of the Udvar-Hazy Center to make way for parking Discovery in her new home at the exact same spot now occupied by the prototype orbiter Enterprise since 2003.

Over the weekend, Enterprise will be hoisted atop the modified 747 and fly to her new home in New York City on April 23 – weather permitting.

Enterprise will land at JFK Airport and eventually be transported by barge to the Intrepid Sea, Air, and Space Museum in Manhattan.

See you at the Smithsonian and send Ken your Discovery photos to post at Universe Today.

Posted on by Ken Kremer

Discovery Poised for Final Takeoff on April 17

Discovery atop the Boeing 747 Shuttle Carrier Aircraft. Credit: Mike Deep.

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Space Shuttle Discovery is poised for her final takeoff, bolted firmly on top of the Boeing 747 Shuttle Carrier Aircraft (SCA) at the Kennedy Space Center in Florida.

This morning (Tuesday, April 16) the mated pair were backed out of the Mate/Demate Device at the Shuttle Landing Facility.

See more images from Universe Today photographer Mike Deep at KSC, below:

The Mate-Demate facility at Kennedy Space Center. Credit: Mike Deep

Kennedy Space Center has been Discovery’s home for three decades and the countdown clock is ticking down relentlessly to a day many hoped would not come foe many more years. In just a few hours she will depart for the last time and never return.

The SCA jet, designated NASA 905, will fire her engines at the runway and take flight shortly after sunrise at 7 a.m. on Tuesday (April 17), fly around the Space Coast facilities and beaches, putting on a great show for the throngs expected to wish her a fond farewell. The best view is from the beaches around Port Canaveral and the lucky visitors at the landing strip itself.

Discovery and the SCA. Credit: Mike Deep.

Then, NASA 905 will head north and ferry Discovery to her permanent new home and museum display at the Smithsonian National Air and Space Museum’s Steven F. Udvar-Hazy Center in Chantilly, Virginia.

With Discovery mated to NASA 905, they begin the move away from the device known as the MDD, or mate/demate Device. Credit: NASA

Discovery is expected to arrive in the Washington, D.C. area around 10 to 11 a.m. with spectacular views around the National Mall area as well as National and Dulles Airports and the Udvar-Hazy Center, at only about 1500 feet altitude – weather permitting.

NASA TV will air live broadcasts of Discovery’s flight

Discovery inside the mate/demate device. Credit: Larry Sullivan/NASA Spaceflight.com

If you spot the shuttle along the way and around the DC area, send Ken your photos to post here at Universe Today.

Final checks on Discovery. Credit: Mike Deep.
NASA astronauts attending the press event for Discovery. Credit: Mike Deep.
Discovery ready for her ride. Credit: Mike Deep.
Credit: Mike Deep.
Aerial View of Space Shuttle Discovery on the Shuttle Carrier Aircraft at the Kennedy Space Center after exiting the mate/demate device at left on the shuttle landing strip. See the Vehicle Assembly Building (VAB) and new mobile launch platform in the background. Credit: NASA

Posted on by Ken Kremer

Shuttle Discovery Mated to 747 Carrier for her Final Flight to Smithsonian Home

At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, mating of space shuttle Discovery and the Shuttle Carrier Aircraft is complete in the mate-demate device nn April 15, 2012. Credit: NASA/Kim Shiflett

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Following a busy weekend of work, Space Shuttle Discovery is now attached piggyback style to the Shuttle Carrier Aircraft (SCA) at NASA’s Kennedy Space Center and all set for the final flight to her ultimate resting place at the Smithsonian National Air and Space Museum’s Steven F. Udvar-Hazy Center in Virginia on Tuesday April 17. There she will reside on permanent display for the public just a short distance outside Washington D.C.

In the predawn hours on Saturday (April 14), Discovery was towed for the last time to the Mate- Demate Device (MDD) at the Shuttle Landing Facility and NASA’s specially outfitted Boeing 747 Jumbo Jet awaiting her in Florida. But howling winds in the subsequent hours delayed the hoist and mate on the back of the huge carrier plane.

Today (Sunday, April 15), the winds calmed and technicians raised Discovery and mechanically bolted her atop the SCA jet, designated NASA 905.

“It may have taken two days because of weather, but Discovery was attached to the Shuttle Carrier Aircraft today (April 15),” NASA KSC spokesman Allard Beutel told Universe Today after the mating operation was finished.

“And we’re on track to give Discovery a proper send off to its new home on Tuesday morning.”

NASA 905 will carry out all the remaining flights to ferry Space Shuttles Discovery, Enterprise and Endeavour to their permanent museum sites in Virginia, New York and California. The last remaining shuttle – Atlantis – will be towed later this year to her new home a few miles down the road at the Kennedy Space Center Visitor Complex.

Towing Discovery into the mate/demate device at the Shuttle Landing Facility at the Kennedy Space Center in Florida. Credit: NASA/Kim Shiflett

The initial mating of Discovery and the SCA in the mate/demate device was completed at about 11:15 a.m. EDT. The shuttle was finally secured to the carrier jet a few hours later on Sunday afternoon and will be backed out of the MDD on Monday, April 16.

NASA 905 will lift off at about 7 a.m. to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17 with a planned arrival between 10 to 11 a.m. depending on weather.

If you spot the shuttle along the way, send Ken your photos to post here at Universe Today.

The SCA will fly over multiple locations from Washington, DC to the Udvar-Hazy Center as low as 1500 feet for the public to enjoy before finally landing at Dulles Airport.

Ken hopes to be on hand at the Udvar-Hazy Center for Universe Today

Discovery’s final departure from the Kennedy Space Center marks a bittersweet time for all who worked on the shuttle program as well as fans and advocates of space exploration across the globe.

Posted on by Ken Kremer

Great ISS Sightings – All Nights this Week of April 9

ISS crossing the evening sky at about 8:40 PM EDT on April 8, 2012 in New Jersey; 25 sec exposure, about 30 degree elevation, looking south. Credit: Ken Kremer.
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    Calling all Skywatching and Space Fans ! This is a great week for observing the International Space Station (ISS), swiftly crossing the evening nighttime sky.

    All this week from Monday thru Saturday, folks all across vast portions of the United States and Canada will be treated to fabulous viewings of the International Space Station. And at very convenient viewing times in the early evening, after dinner and in prime time.

    From Maine to Vancouver, from Ohio to Texas, from Florida to New Mexico – many of you will be in for a rather pleasurable ISS treat.

    Of course the exact viewing times, days, elevations, durations and directions varies greatly depending on your exact location – and clear skies. And the viewing parameters change daily.

    Check out this NASA website for Human Spaceflight Sighting Opportunities. It’s simple. Just plug in your country, state and select a local town. Also check out – Heavens Above.

    This evening, Monday April 9, I shot a few 20 to 30 second exposures as the ISS was speeding past at about a 30 degree elevation. But the best viewings at far higher elevations are yet to come the remainder of this week.

    ISS speeds across evening sky on April 9, 2012. 6 Humans from the US, Russia and the Netherlands are currently living aboard the ISS. Credit: Ken Kremer

    The International Space Station is the brightest manmade object in the night sky and even brighter than Venus depending on orbital mechanics. Only our Sun is brighter. Since Venus is an evening observing target this week, maybe you’ll even be lucky to see the ISS seem to pass close by that hellishly hot planet.

    Have you ever looked at the ISS hurtling overhead ?

    Take some shots and send them to Ken to post here at Universe Today.

    And remember, 6 Humans from the US, Russia and the Netherlands are currently residing aboard the ISS, conducting science research and sending back gorgeous shots of all of us back here on Earth.