Delta Aquarid Meteors seen from Dayton, Ohio on July 30, 2013. Credit and copyright: John Chumack.
Did those of you in the northern hemisphere have a chance to look for the Delta Aquarid meteors? Ever-faithful astronomer and astrophotographer John Chumack captured this view overnight from his observatory near Dayton, Ohio. Can you see the two meteors in this frame?
Below is another shot from John taken on July 29 using his Meteor Video Camera Network, and he captured about half a dozen bright ones, including one meteor through the clouds.
A Delta Aquarid meteor shows up through the clouds on July 29, 2013. Credit and copyright: John Chumack.
As our own David Dickenson said in his recent “how to” post on observing the Delta Aquarids, this meteor shower “can serve as a great “dry run” for the Perseids in a few weeks. You don’t need any specialized gear, simply find a dark site, block the Moon behind a building or hill, and watch.”
And as far as photographing them, David says that technique is “similar to doing long exposures of star trails.”
Simply aim your tripod mounted DSLR camera at a section of sky and take a series of time exposures about 1-3 minutes long to reveal meteor streaks. Images of Delta Aquarids seem elusive, almost to the point of being mythical. An internet search turns up more blurry pictures of guys in ape suits purporting to be Bigfoot than Delta Aquarid images… perhaps we can document the “legendary Delta Aquarids” this year?
Italian astronaut Luca Parmitano during a spacesuit fit check before his mission. Credit: NASA
As NASA investigates how astronaut Luca Parmitano’s spacesuit filled with water during a spacewalk two weeks ago, a new video by fellow Expedition 36 astronaut Chris Cassidy demonstrated the path the pool took inside Parmitano’s helmet.
Cassidy described the situation as leaking “cooling water” that got “somehow into his ventilation system” and spread into Parmitano’s helmet. The cause is still being investigated.
From a ventilation port at the back of the helmet, “the water bubbles started to build up behind this white plastic piece,” Cassidy said in the video, pointing at a support that was behind Parmitano’s head.
Update: There’s now part 2 of Cassidy’s description of the leak, below:
“Once the water got big enough that it went all the way around and started coming outside the edge of the white plastic, then it saturated his communication cap and the … flow brought the water all around his head. And he had water filled up in his ear hubs, and it started to creep into his eyes, and cover his nose.”
Calling it a “scary situation”, Cassidy said that if the leak had continued, “it would have been very serious.” NASA, however, aborted the spacewalk quickly after Parmitano reported the problem. Parmitano and Cassidy, who were outside together, were back in the International Space Station in minutes.
Parmitano, for his part, has repeatedly said that he is doing all right. “Guys, I am doing fine and thanks for all the support. I am really okay and ready to move on,” he said, as reported in a July 18 ESA blog post.
NASA has at least two probes going on: an engineering analysis to find the cause, and a more wide-ranging mishap investigation to look at spacewalk procedures and overall crew safety during spaceflights. The agency also sent a spacesuit repair kit on the Progress spacecraft that docked with the International Space Station on July 27.
The July 16 spacewalk ended after just 1 hour, 32 minutes. All of the tasks for the planned 6.5-hour outing, which included preparing data cables and power for a forthcoming Russian module, are not urgent and can be done any time, NASA said. Further American spacewalks are suspended for the time being.
Canadian Space Agency astronaut Chris Hadfield, Expedition 35 Commander, floats freely in the Unity node of the International Space Station. Credit: NASA.
Leave it to the well-spoken and articulate Chris Hadfield to explain the importance of the space station in such poetic language. In this interview with NPR this week, Hadfield not only talks about how his recent Expedition to the ISS “went viral” but what else is going on in space besides making music videos.
Listen to the entire interview (7 and a half minutes) below, but the main points about the cost and utility of the ISS are….
WERTHEIMER: Do you think that’s important for the future of the program, to try to make a big extra effort to engage people, when we’re all so concerned about how much it all costs?
HADFIELD: You know, you can’t support the Space Station if you don’t know it exists. People have to know it exists, and see that it serves us at a lot of different levels, everything from understanding how to extinguish flame inside a wall, to the fact that you can record a David Bowie video in weightlessness and thrill, you know, tens of millions of people. All of that is possible up there. You need to make an effort to engage people in it and show them that this is, of all the things that we’re choosing to do with our tax dollars, this is one of the really cool, interesting things. And then they can make their own decision as to whether we should support it or not.
WERTHEIMER: The science has always been interesting, of course, but the thing that I think most people on Earth think about is not going to the Space Station, but going past the Space Station, traveling in space.
HADFIELD: For thousands of years, people sailed in rivers and up and down the coast. And only after they had invented so many things – navigation, food supply, really good sails, ships they could count on – did they turn away from shore and go over the horizon. They had to invent a lot of things first. There may have been people that went over the horizon, but they probably didn’t come back, because they didn’t know enough stuff yet.
And we are, right now, sailing within the sight of shore. We’re trying to figure out all those things as we go around the world, so that when you do fire your engines and go 40 percent faster and leave the Earth, and it’s been really hard to turn around and come back, that you can count on your sailing ship, that it’s going to keep you alive and get you where you want to go. And that’s what the Space Station is. It is the crucible where we’re learning and testing and figuring out all those things so that we can go further, which is inevitably what we’re going to do.
The idea that there is life on other worlds is humbling and exciting, and finding life on another world would change everything. This has been a driving force for scientists for decades. We find life wherever we find water on Earth, in pools of boiling water, inside glaciers, even in nuclear reactors.
Because of this, our best candidate for life is probably Mars.
The planet is hostile to life now, but evidence is mounting that it was once a warm and habitable world, with rivers, lakes and oceans. Mars could have vast reserves of subsurface water, where life could thrive even now.
If we did discover life there, it’s possible that it’s completely unrelated to Earth life. This would demonstrate that life can originate on almost any world, with the right conditions.
It’s also possible that life on Mars is related to Earth, and our two planets share a common ancestor billions of years in the past.
This is a theory called panspermia.
It suggests that life on Earth and Mars are connected. That life has been traveling from Mars to Earth and vice-versa for billions of years. “How is this possible?” you might ask.
Meteorites.
Mars Meteorite. Credit: NASAWe know that both Earth and Mars have been hammered by countless asteroids in their history long. Some of these impacts are so powerful, rock debris is ejected into escape orbits. This blasted rock could orbit the Sun for eons and then re-enter the atmosphere of another planet.
We know this is true, because we have meteorites on Earth which originated on Mars. Tiny gaps in the rock contained gases which match the atmosphere of Mars. You would think that an asteroid strike would sterilize life in the rocks, but amazingly, bacterial life can survive this process.
Microbial life can even withstand the harsh temperature, radiation and vacuum of space for thousands – possibly millions of years – riding inside their rocky spacecraft.
Some bacteria could even survive when their “space rock” enters the atmosphere of another world.
So a natural space exploration program has been in place for billions of years, with asteroid strikes hurling life-filled rocks into space, which then smash into other worlds.
Life on Mars has been elusive so far, but there are missions in the works which will have the scientific instruments on board to hunt for life on the Red Planet.
Artist illustration of a Europa probe. Image credit: NASA/JPLIf we do find it, will we discover that it’s actually related to us? If we find life under the ice on Europa, or in the cloud tops of Venus, will we discover the same thing?
It gets even stranger.
The Solar System is leaving a trail of debris behind as it orbits around the Milky Way, which could be colliding with other star systems. Which means, it’s possible that life around other stars is related to us too.
So maybe there’s no life on Mars, or if there is, maybe it originated on its own, or maybe it’s all related, as a result of trading life back and forth across giant spans of time and space.
Whatever the case, the search sure is going to be exciting.
1st operational Cygnus pressurized cargo module from Orbital Science Corp. and newly arrived from Italy sits inside high bay processing facility at NASA Wallops Flight Facility, VA. This Cygnus may launch to the ISS as early as December 2013. Credit: Ken Kremer (kenkremer.com)
The privately built Cygnus Pressurized Cargo Module (PCM) was developed by Orbital Sciences Corp. & Thales Alenia Space under the Commercial Resupply Services (CRS) cargo transport contract with NASA.
Universe Today took an exclusive look at the unmanned Cygnus cargo carrier housed inside the high bay facility where the vehicle is being processed for flight during a visit at NASA Wallops.
Cygnus is an essential lifeline to stock the station with all manner of equipment, science experiments, food, clothing, spare parts and gear for the international crew of six astronauts and cosmonauts.
1st operational Cygnus pressurized cargo module from Orbital Science Corp. sits inside high bay clean room facility with crane overhead at NASA Wallops Flight Facility, VA for preflight processing. Credit: Ken Kremer (kenkremer.com)
The Cygnus PCM is manufactured by Thales Alenia Space at their production facility in Turin, Italy under a subcontract from Orbital.
The design is based on the Multi Purpose Logistic Module (MPLM) space shuttle cargo transporter.
The standard version has an internal volume of 18.9 cubic meters and can carry a total cargo mass of 2000 kg.
It was encased inside a special shipping container and flown from Italy to the US aboard an Antonov An-124 aircraft on July 17. The massive An-124 is the world’s second largest operating cargo aircraft.
After unloading from the An-124 and movement into a clean room high bay at Wallops Processing Building H-100, the shipping crate’s cover was raised using a 20 ton bridge crane. The PCM was unloaded and likewise gently craned over to an adjacent high bay work stand for flight processing.
Cygnus pressurized cargo module was loaded inside this shipping container and transported aboard Antonov An-124 from Italy to NASA Wallops Flight Facility high bay processing facility and launch site in Virginia. Credit: Ken Kremer (kenkremer.com)
Approximately a month and a half before launch, technicians mate the Cygnus PCM to the Service Module (SM) which houses the spacecraft’s avionics, propulsion and power systems and propels the combined vehicle to berth at the ISS.
The Cygnus SM is built by Orbital at their manufacturing facility in Dulles, VA., and shipped to Wallops for integration with the PCM in the processing building.
This particular vehicle is actually the second PCM bound for the ISS, but will be the first of eight operational cargo delivery runs to the space station over the next few years.
The first PCM to fly is set to blast-off on a Demonstration Mission (COTS 1) to the ISS in some six weeks on Sept. 14 atop Orbital’s privately developed Antares rocket. It is also in the midst of flight processing at Wallops inside a different building known as the Horizontal Integration Facility (HIF) where it is integrated with the Antares rocket.
Cygnus stored inside shipping container is unloaded from Antonov An-124 aircraft after arrival at NASA Wallops, VA on July 17, 2013. Credit: NASA/Patrick Black
Orbital says the Cygnus Demo vehicle is already fueled and will be loaded with about 1550 kg of cargo for the station crew.
The purpose of the demonstration flight is to prove that the unmanned spacecraft can safely and successfully rendezvous and dock with the orbiting outpost. The flight objectives are quite similar to the initial cargo delivery test flights successfully accomplished by Orbital’s commercial rival, SpaceX.
All of Orbital’s ISS cargo resupply missions will occur from the Mid-Atlantic Regional Spaceport’s (MARS) pad 0A at Wallops.
Antares rocket will launch Cygnus spacecraft to the ISS from Mid-Atlantic Regional Spaceport (MARS) Launch Pad 0A at NASA Wallops Flight Facility, Virginia. Credit: Ken Kremer (kenkremer.com)
This past spring on April 21, Orbital successfully launched the 1st test flight of the Antares rocket. Read my articles here and here.
Orbital’s Antares/Cygnus system is similar in scope to the SpaceX Falcon 9/Dragon system.
Both firms won lucrative NASA contracts to deliver approximately 20,000 kilograms each of supplies and science equipment to the ISS during some 20 flights over the coming 3 to 4 years.
Cygnus spacecraft is loaded onto the Cygnus Vertical Carrier (CVC) 16-wheeled transporter to move between processing facilities at NASA’s Wallops Island launch site. Credit: Ken Kremer (kenkremer.com)
The goal of NASA’s CRS initiative is to achieve safe, reliable and cost-effective transportation to and from the ISS and low-Earth orbit (LEO) as a replacement for NASA’s now retired Space Shuttle Program.
Orbital’s contract with NASA for at least eight Antares/Cygnus resupply missions to the ISS is worth $1.9 Billion.
This graphic depicts HD 189733b, the first exoplanet caught passing in front of its parent star in X-rays. Credit: X-ray: NASA/CXC/SAO/K.Poppenhaeger et al; Illustration: NASA/CXC/M.Weiss.
In the medical field, X-rays are used for finding and diagnosing all sorts of ailments hidden inside the body; in astronomy X-rays can also be used to study obscured objects like pulsars and black holes. Now, for the first time, X-rays have been used to study another object in space that tends to be difficult to spot: an extra solar planet. The Chandra X-ray Observatory and the XMM Newton Observatory combined their X-ray super powers to look at an exoplanet passing in front of its parent star.
This is not a new detection of an exoplanet – this same exoplanet, named HD 189733b has been one of the most-observed planets orbiting another star, and was recently in the news for Hubble confirming the planet’s ocean-blue atmosphere and the likelihood of having glass raining down on the planet.
But being able to see the exoplanet in X-rays is good news for future studies and perhaps even detections of planets around other stars.
“Thousands of planet candidates have been seen to transit in only optical light,” said Katja Poppenhaeger of Harvard-Smithsonian Center for Astrophysics (CfA) in Cambridge, Mass., who led the new study, which will be published in the Aug. 10 edition of The Astrophysical Journal. “Finally being able to study one in X-rays is important because it reveals new information about the properties of an exoplanet.”
Artist’s impression of the deep blue planet HD 189733b, based on observations from the Hubble Space Telescope. Credit: NASA/ESA.
HD 189733b is a Jupiter-sized extrasolar planet orbiting a yellow dwarf star that is in a binary system called HD 189733 in the constellation of Vulpecula, near the Dumbell Nebula, approximately 62 light years from Earth.
This huge gas giant orbits very close to its host star and gets blasted with X-rays from its star — tens of thousands of times stronger than the Earth receives from the Sun — and endures wild temperature swings, reaching scorching temperatures of over 1,000 degrees Celsius. Astronomers say it likely rains glass (silicates) – sideways — in howling 7,000 kilometer-per-hour winds.
But it is relatively close to Earth, and so it has been oft-studied by many other space and ground-based telescopes.
In a blog post, Poppenhaeger said she was inspired by the launch of the Kepler telescope, and wondered if exoplanets could be seen in X-rays. She was excited when she found archived data from XMM Newton showing a fifteen hour long observation of the star HD 189733 and the “Hot Jupiter” HD 189733b was crossing in front of the star during that observation.
But the light curve was disappointing, she said. “The star is magnetically active, meaning that its corona is bright and flickering, so its X-ray light curve showed lots of scatter. Looking for a transit signal in this light curve was like trying to hear a whisper in a noisy pub,” Poppenhaeger wrote.
She knew with more data, the transit signal would be clearer, so she applied for – and got – time on Chandra to observe this exoplanet.
She combined the data from all the observations and was finally successful. “I could detect the transit of the planet in X-rays,” Poppenhaeger said. “What surprised me was how deep the transit was: The planet swallowed about 6-8% of the X-ray light from the star, while it only blocked 2.4% of the starlight at optical wavelengths. That means that the planet’s atmosphere blocks X-rays at altitudes of more than 60,000 km above its optical radius – a 75% larger radius in X-rays!”
That means that the outer atmosphere has to be heated up to about 20,000 K to sustain itself at such high altitudes. Additionally, the planet loses its atmosphere about 40% faster than thought before.
Poppenhaeger said she and her colleagues will test more X-ray observations of other similar planets such as CoRoT-2b to learn more about how stars can affect a planet’s atmosphere.
In case you missed it live, here was our Virtual Star Party for Sunday, July 28, 2013. We had two active telescopes going, but they were highly automated scopes slewing from target to target with precise efficiency. We probably hit a new record this week, with the number of objects we targeted. We had nebulae, galaxies, star clusters and special appearances from Neptune… and Pluto; our first of the season!
We get together every Sunday night for a Virtual Star Party in a live Google+ Hangout on Air. You can watch live, and ask your questions about astronomy and astrophotography; we’ll even take requests.
We’ll broadcast the video live from here on Universe Today, or over on Google+.
If you’re an astronomer and have the ability to view images from your telescope on your computer, we’d love to have you join us some week. Especially if you live in Europe or South America.
When we heard that the Alan Parsons Project song “Eye in the Sky” was beamed to humanity’s constant eye in the sky — the International Space Station — we just about exploded with space geekiness. It’s even more awesome that the video accompanying the song has tons of space scenes to enjoy.
Turns out the band’s song is Expedition 36 astronaut Luca Parmitano’s favorite, which is why Parsons dedicated that to him during a July 23 Alan Parsons Live Project concert at the Foro Italico in Rome.
Projected vs observed sunspot numbers for solar cycles #23 & #24. (Credit: Hathaway/NASA/MSFC).
Our nearest star has exhibited some schizophrenic behavior thus far for 2013.
By all rights, we should be in the throes of a solar maximum, an 11-year peak where the Sun is at its most active and dappled with sunspots.
Thus far though, Solar Cycle #24 has been off to a sputtering start, and researchers that attended the meeting of the American Astronomical Society’s Solar Physics Division earlier this month are divided as to why.“Not only is this the smallest cycle we’ve seen in the space age, it’s the smallest cycle in 100 years,” NASA/Marshall Space Flight Center research scientist David Hathaway said during a recent press teleconference conducted by the Marshall Space Flight Center.
Cycle #23 gave way to a profound minimum that saw a spotless Sol on 260 out of 365 days (71%!) in 2009. Then, #Cycle 24 got off to a late start, about a full year overdue — we should have seen a solar maximum in 2012, and now that’s on track for the late 2013 to early 2014 time frame. For solar observers, both amateur, professional and automated, it seems as if the Sun exhibits a “split-personality” this year, displaying its active Cycle #24-self one week, only to sink back into a blank despondency the next.
This new cycle has also been asymmetrical as well. One hallmark heralding the start of a new cycle is the appearance of sunspots at higher solar latitudes on the disk of the Sun. These move progressively toward the Sun’s equatorial regions as the cycle progresses, and can be mapped out in what’s known as a Spörer’s Law.
The sunspot number “butterfly” graph, illustrating Spörer’s Law that susnpots gradually migrate towards the equator of the Sun as the solar cycle progresses. (Credit: NASA/MSFC).
But the northern hemisphere of the Sun has been much more active since 2006, with the southern hemisphere experiencing a lag in activity. “Usually this asymmetry lasts a year or so, and then the hemispheres synchronize,” said Giuliana de Toma of the High Altitude Observatory.
So far, several theories have been put forth as to why our tempestuous star seems to be straying from its usual self. Along with the standard 11-year cycle, it’s thought that there may be a longer, 100 year trend of activity and subsidence known as the Gleissberg Cycle.
The Sun is a giant ball of gas, rotating faster (25 days) at the equator than at the poles, which rotate once every 34.5 days. This dissonance sets up a massive amount of torsion, causing the magnetic field lines to stretch and snap, releasing massive amounts of energy. The Sun also changes polarity with every sunspot cycle, another indication that a new cycle is underway.
But predictions have run the gamut for Cycle #24. Recently, solar scientists have projected a twin peaked solar maximum for later this year, and thus far, Sol seems to be following this modified trend. Initial predictions by scientists at the start of Cycle #24 was for the sunspot number to have reached 90 by August 2013; but here it is the end of July, and we’re sitting at 68, and it seems that we’ll round out the northern hemisphere Summer at a sunspot number of 70 or so.
Some researchers predict that the following sunspot Cycle #25 may even be absent all together.
“If this trend continues, there will be almost no spots in Cycle 25,” Noted Matthew Penn of the National Solar Observatory, hinting that we may be on the edge of another Maunder Minimum.
Looking back over solar cycles for the past 500 years. (Credit: D. Hathaway/NASA/MSFC).
The Maunder Minimum was a period from 1645 to 1715 where almost no sunspots were seen. This span of time corresponded to a medieval period known as the Little Ice Age. During this era, the Thames River in London froze, making Christmas “Frost Fairs” possible on the ice covered river. Several villages in the Swiss Alps were also consumed by encroaching glaciers, and the Viking colony established in Greenland perished. The name for the period comes from Edward Maunder, who first noted the minimum in papers published in the 1890s. The term came into modern vogue after John Eddy published a paper on the subject in the journal of Science in 1976. Keep in mind, the data from the period covered by the Maunder Minimum is far from complete— Galileo had only started sketching sunspots via projection only a few decades prior to the start of the Maunder Minimum. But tellingly, there was a span of time in the early 18th century when many researchers supposed that sunspots were a myth! They were really THAT infrequent…
Just what role a pause in the solar cycle might play in the climate change debate remains to be seen. Perhaps, humanity is getting a brief (and lucky) reprieve, a chance to get serious about controlling our own destiny and doing something about anthropogenic climate-forcing. On a more ominous note, however, an extended cooling phase may give us reason to stall on preparing for the inevitable while giving ammunition to deniers, who like to cite natural trends exclusively.
Down but not out? Sol looking more like its solar max-self earlier this month on July 8th. (Photo by author).
Whatever occurs, we now have an unprecedented fleet of solar monitoring spacecraft on hand to watch the solar drama unfold. STEREO A & B afford us a 360 degree view of the Sun. SOHO has now monitored the Sun for the equivalent of more than one solar cycle, and NASA’s Solar Dynamics Observatory has joined it in its scrutiny. NASA’s Interface Region Imaging Spectrograph (IRIS) just launched earlier this year, and has already begun returning views of the solar atmosphere in unprecedented detail. Even spacecraft such as MESSENGER orbiting Mercury can give us vital data from other vantage points in the solar system.
Cycle #24 may be a lackluster performer, but I’ll bet the Sun has a few surprises in store. You can always get a freak cloud burst, even in the middle of a drought. Plus, we’re headed towards northern hemisphere Fall, a time when aurora activity traditionally picks up.
Be sure to keep a (safely filtered) eye on ol’ Sol— it may be the case over these next few years that “no news is big news!”
China's now-industrialized Pearl River Delta, seen in October 1973 (top) and January 2003 (bottom)
Since the launch of its first satellite in 1972, the eight NASA/USGS Landsat satellites have made the longest continuous observations of Earth’s surface, providing invaluable data for research in agriculture, geology, forestry, regional planning, education, mapping, global change research, as well as important emergency response and disaster relief information. In addition, having such a long span of data allows us to easily see the expansion of human development in many areas — unprecedented before-and-after views of city growth seen from space.
These images, taken over the course of the Landsat program, illustrate the visible impact of over three decades of human development:
Chandler, Arizona imaged in 1985 (top) and 2011 (bottom.) As its economy shifted from agriculture to manufacturing and electronics, Chandler’s population multiplied 8 times to over 236,000.The explosion of Istanbul’s population from 2 to 13 million people is evident in these Landsat images, comparing 1975 to 2011. Vegetation appears red in the imaging wavelengths used here.A few years ago one of the fastest-growing cities in the US, Las Vegas is seen here in images taken in 1984 (top) and 2011 (bottom.) The sprawling development — as well as the decrease in water level of Lake Mead — is evident.Some of the most dramatic — and rapid — changes have occurred in Dubai, whose palm- and continent-shaped artificial islands suddenly appear between images taken in 2000 (top) and 2010 (bottom.) Once barely visible against the desert landscape, Dubai is now an international center of business, tourism, and oil production.
The Landsat Program is a series of Earth-observing satellite missions jointly managed by NASA and the U.S. Geological Survey. In 1972, the launch of ERTS-1 (Earth Resources Technology Satellite, later renamed Landsat 1) started the era of a series of satellites that have since continuously acquired space-based land remote sensing data.
The latest satellite in the Landsat series, the Landsat Data Continuity Mission (LDCM) — now named Landsat 8 — was launched on February 11, 2013. Landsat 8 data is now available free to the public online here.
