The Secrets of Moondogs

A Moondog, captured over Hampton Bays, New York in December 2011. Credit: Jeff Schultz

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You’ve probably heard of — and likely have even seen — a Sundog, the atmospheric phenomenon that creates rainbow-colored blobs or arcs of light on either side of the Sun. But did you know the Moon can have ‘dogs’ too? Also known as mock moons, false moons, or the scientific name of paraselenae, Moondogs aren’t seen as often as Sundogs. However, the conditions needed to create either of the ‘dogs’ are about the same. This great image of a Moondog, above, by Jeff Schultz is a perfect example of the kind of night you might see this gorgeous phenomenon.

What are the secrets to how Moondogs are produced?

A bright Moondog on January 20, 2012 seen in Wiltshire, England. Credit and copyright: Richard Fleet. Used by permission.
A bright Moondog on January 20, 2012 seen in Wiltshire, England. Credit: Richard Fleet

Moondogs are seen most often in the winter when ice crystals may be present in the atmosphere. But they can appear anytime of the year when hexagon-shaped ice crystals might be high in the sky, or also when thin cirrus or cirrostratus clouds are just right. What happens is that the ice crystals or clouds refract the moonlight, creating blobs or arcs of light to the left and right of the Moon, or sometimes just on one side.

Also, the Moon usually needs to be full or nearly full, along with being low in the sky for the effect to be produced. The angular separation of the light blobs from the Moon is usually 22 degrees.

Sometimes, a full halo of light around the Moon will also appear in conjunction with the Moondogs; other times smaller arcs of light will be part of the effect, but often Moondogs appear without any other effects.

Moondogs can appear colorful like a Sundog or ‘shine’ with a light similar to the Moon.

A Moondog seen in Adelaide, Australia on November 28, 2012. Credit: Ian Musgrave.
A Moondog seen over Adelaide, Australia on November 28, 2012. Credit: Ian Musgrave.

Moondogs are seen in both hemispheres, as this image from Ian Musgrave in Australia attests, but it seems that the effect is seen most often the farther north you are in the northern hemisphere and the farther south you are in the southern hemisphere.

You never know exactly when you might be lucky enough to see a Moondog, so we recommend looking at the Moon every night! Also, don’t forget to wink at the Moon, too.

For more detailed information and images of Moondogs, Sundogs and other optical effects, Richard Fleet (the photographer who captured the second image in this article) has a great website: “Glows, Bows and Haloes.”

NASA’s Lunar Orbiter Gets an Art Lesson with Lasers

In the ultimate example of science imitating art, engineers working with NASA’s Lunar Reconnaissance Orbiter recently beamed an image of the Mona Lisa to the LRO and back via laser beam in order to measure the rate of transmission between the spacecraft and Earth. This allowed them to then calibrate their software to correct for any discrepancies between the image sent and the one received, resulting in a picture-perfect result.

Leonardo would definitely have approved.

From NASA’s Goddard Space Flight Center:

As part of the first demonstration of laser communication with a satellite at the moon, scientists with NASA’s Lunar Reconnaissance Orbiter (LRO) beamed an image of the Mona Lisa to the spacecraft from Earth.

The iconic image traveled nearly 240,000 miles in digital form from the Next Generation Satellite Laser Ranging (NGSLR) Station at NASA’s Goddard Space Flight Center in Greenbelt, MD, to the Lunar Orbiter Laser Altimeter (LOLA) instrument on the spacecraft. By transmitting the image piggyback on laser pulses that are routinely sent to track LOLA’s position, the team achieved simultaneous laser communication and tracking.

“This test, and the data obtained from it, sets the stage for future high data-rate laser communications demonstrations that will be an essential feature of NASA’s next Moon mission: the Lunar Atmosphere and Dust Environment Explorer.

Video: NASA/GSFC

New Look and New Animation for Orion’s 2017 Flight to the Moon and Back

The Orion spacecraft has gotten a new look for its first launch atop the inaugural flight of NASA’s Space Launch System (SLS) booster on the Exploration Mission-1 flight around the Moon in 2017 as seen in this new animation.

The vehicles service module will be built by the European Space Agency (ESA), as a result of a new bilateral agreement between NASA and ESA. Orion is designed to carry humans back to the Moon and to deep space destinations like Asteroids and Mars.

The service module will fuel and propel the capsule on its uncrewed journey to the Moon and back on EM-1 in 2017.

Read my follow-up report for details about the new NASA/ESA agreement. See my earlier story here, about preparations for the first Orion launch in September 2014 on the upcoming Exploration Flight Test-1 in 2014 atop a Delta IV Heavy. An unmanned Orion will fly on a two orbit test flight to an altitude of 3,600 miles above Earth’s surface, farther than a human spacecraft has gone in 40 years, and then plunge back to Earth to test the spacecrafts systems and heat shield.

NASA is also simultaneously fostering the development of commercial ‘space taxis’ to fly astronauts to the International Space Station (ISS) as part of a dual track approach to restore America’s human space launch capability. The 1st commercial crew vehicle might fly as early as 2015 – details here.

Ken Kremer

Image caption: Orion EFT-1 crew cabin construction ongoing at the Kennedy Space Center which is due to blastoff in September 2014 atop a Delta 4 Heavy rocket. Credit: Ken Kremer

Crescent Moon Photos from Around the World

Venus and the Moon on 1-10-13 from Tucson, Arizona. Credit: Robert Sparks

For the past week or so, we’ve had either a waxing or waning crescent Moon (save for the New Moon on January 11) and astrophotographers have been out in full force capturing the beauty of this sliver of light, and sometimes, like the image above by Rob Sparks (hale_bopp37 on Flickr) even a little Earthshine. Enjoy these stunning photos from our readers around the world!

Luna, January 14, 2013. Credit: Raymond Gilchrist
Luna, January 14, 2013. Credit and copyright: Raymond Gilchrist
The 2% waxing crescent Moon at sunset, January 12, 2013. Credit and copyright, Tavi Greiner.
The 2% waxing crescent Moon at sunset, January 12, 2013. Credit and copyright, Tavi Greiner.
Waxing crescent Moon on January 14, 2013. Credit and copyright: Sculptor Lil on Flickr.
Waxing crescent Moon on January 14, 2013 from London, England. Credit and copyright: Sculptor Lil on Flickr.
The crescent Moon taken at sunrise on  January 9, 2013 from Carmyllie, Scotland. Credit and copyright: Mike Walton.
The crescent Moon taken at sunrise on January 9, 2013 from Carmyllie, Scotland. Credit and copyright: Mike Walton.
Earthshine on January 15, 2013 from Kuala Lumpur. Credit and copyright: Shahrin Ahmad.
Earthshine on January 15, 2013 from Kuala Lumpur. Credit and copyright: Shahrin Ahmad.
The crescent Moon -- the 'easy way' -- a hand-held camera, no tripod, just Lumix DMC-FZ48 at max. optical zoom. Credit and copyright: Daniel Fischer.
The crescent Moon -- the 'easy way' -- a hand-held camera, no tripod, just a Lumix DMC-FZ48 at maximum optical zoom. Credit and copyright: Daniel Fischer.

Astrophotographer (and blogger) Daniel Fischer notes that his image, above, was taken freehand with a simple camera, “a ‘work’ of a few seconds,” he said. “Might encourage others to give it a try with their own cameras.”

Want to get your astrophoto featured on Universe Today? Join our Flickr group or send us your images by email (this means you’re giving us permission to post them). Please explain what’s in the picture, when you took it, the equipment you used, etc.

Private Test Pilots to Fly 1st Commercial Crewed Space Flights for NASA

Dream Chaser from Sierra Nevada docks at ISS

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Image Caption: Dream Chaser commercial crew vehicle built by Sierra Nevada Corp docks at ISS

Commercial test pilots, not NASA astronauts, will fly the first crewed missions that NASA hopes will at last restore America’s capability to blast humans to Earth orbit from American soil – perhaps as early as 2015 – which was totally lost following the forced shuttle shutdown.

At a news briefing this week, NASA managers at the Kennedy Space Center (KSC) said the agency is implementing a new way of doing business in human spaceflight and purposely wants private companies to assume the flight risk first with their crews before exposing NASA crews as a revolutionary new flight requirement. Both NASA and the companies strongly emphasized that there will be no shortcuts to flying safe.

A trio of American aerospace firms – Boeing, SpaceX and Sierra Nevada Corp – are leading the charge to develop and launch the new commercially built human-rated spacecraft that will launch Americans to LEO atop American rockets from American bases.

The goal is to ensure the nation has safe, reliable and affordable crew transportation systems for low-Earth orbit (LEO) and International Space Station (ISS) missions around the middle of this decade.

The test launch schedule hinges completely on scarce Federal dollars from NASA for which there is no guarantee in the current tough fiscal environment.

The three companies are working with NASA in a public-private partnership using a combination of NASA seed money and company funds. Each company was awarded contracts under NASA’s Commercial Crew Integrated Capability Initiative, or CCiCap, program, the third in a series of contracts aimed at kick starting the development of the so-called private sector ‘space taxis’ to fly astronauts to and from the ISS.

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Caption: Boeing CST-100 crew vehicle docks at the ISS

The combined value of NASA’s Phase 1 CCiCap contracts is about $1.1 Billion and runs through March 2014 said Ed Mango, NASA’s Commercial Crew Program manager. Phase 2 contract awards will follow and eventually lead to the actual flight units after a down selection to one or more of the companies, depending on NASA’s approved budget.

Since the premature retirement of NASA’s shuttle fleet in 2011, US astronauts have been 100% reliant on the Russians to hitch a ride to the ISS – at a price tag of over $60 Million per seat. This is taking place while American aerospace workers sit on the unemployment line and American expertise and billions of dollars of hi-tech space hardware rots away or sits idly by with each passing day.

Boeing, SpaceX and Sierra Nevada Corp seek to go where no private company has gone before – to low Earth orbit with their private sector manned spacecraft. And representatives from all three told reporters they are all eager to move forward.

All three commercial vehicles – the Boeing CST-100; SpaceX Dragon and Sierra Nevada Dream Chaser – are designed to carry a crew of up to 7 astronauts and remain docked at the ISS for more than 6 months.

“For well over a year now, since Atlantis [flew the last space shuttle mission], the United States of America no longer has the capability to launch people into space. And that’s something that we are not happy about,” said Garrett Reisman, a former space shuttle astronaut who is now the SpaceX Commercial Crew project manager leading their development effort. “We’re very proud to be part of the group that’s going to do something about that and get Americans back into space.”

IMG_3754a_SpaceX launch May 22 2012_Ken Kremer

Caption: Blastoff of SpaceX Cargo Dragon atop Falcon 9 from Cape Canaveral, Florida on May, 22, 2012, bound for the ISS. Credit: Ken Kremer

“We are the emotional successors to the shuttle,” said Mark Sirangelo, Sierra Nevada Corp. vice president and SNC Space Systems chairman. “Our target was to repatriate that industry back to the United States, and that’s what we’re doing.”

Sierra Nevada is developing the winged Dream Chaser, a mini-shuttle that launches atop an Atlas V rocket and lands on a runway like the shuttle. Boeing and SpaceX are building capsules that will launch atop Atlas V and Falcon 9 rockets, respectively, and then land by parachute like the Russian Soyuz capsule.

SpaceX appears to be leading the pack using a man-rated version of their Dragon capsule which has already docked twice to the ISS on critical cargo delivery missions during 2012. From the start, the SpaceX Dragon was built to meet the specification ratings requirements for a human crew.

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Caption: Dragon spacecraft approaches the International Space Station on May 25, 2012 for grapple and berthing . Photo: NASA

Reisman said the first manned Dragon test flight with SpaceX test pilots could be launched in mid 2015. A flight to the ISS could take place by late 2015. Leading up to that in April 2014, SpaceX is planning to carry out an unmanned in-flight abort test to simulate and test a worst case scenario “at the worst possible moment.”

Boeing is aiming for an initial three day orbital test flight of their CST-100 capsule during 2016, said John Mulholland, the Boeing Commercial Programs Space Exploration vice president and program manager. Mulholland added that Chris Ferguson, the commander of the final shuttle flight by Atlantis, is leading the flight test effort.

Boeing has leased one of NASA’s Orbiter Processing Facility hangers (OPF-3) at KSC. Mulholland told me that Boeing will ‘cut metal’ soon. “Our first piece of flight design hardware will be delivered to KSC and OPF-3 within 5 months.”

IMG_9198a_Boeing CST_Ken Kremer

Caption: Boeing CST-100 capsule mock-up, interior view. Credit: Ken Kremer

Sierra Nevada plans to start atmospheric drop tests of an engineering test article of the Dream Chaser from a carrier aircraft in the next few months in an autonomous mode. The test article is a full sized vehicle.

“It’s not outfitted for orbital flight; it is outfitted for atmospheric flight tests,” Sirangelo told me. “The best analogy is it’s very similar to what NASA did in the shuttle program with the Enterprise, creating a vehicle that would allow it to do significant flights whose design then would filter into the final vehicle for orbital flight.”

Now to the issue of using commercial space test pilots in place of NASA astronauts on the initial test flights.

At the briefing, Reisman stated, “We were told that because this would be part of the development and prior to final certification that we were not allowed, legally, to use NASA astronauts to be part of that test pilot crew.”

So I asked NASA’s Ed Mango, “Why are NASA astronauts not allowed on the initial commercial test flights?”

Mango replied that NASA wants to implement the model adopted by the military wherein the commercial company assumes the initial risk before handing the airplanes to the government.

“We would like them to get to a point where they’re ready to put their crew on their vehicle at their risk,” said Mango. “And so it changes the dynamic a little bit. Normally under a contract, the contractor comes forward and says he’s ready to go fly but it’s a NASA individual that’s going to sit on the rocket, so it becomes a NASA risk.

“What we did is we flipped it around under iCAP. It’s not what we’re going to do long term under phase two, but we flipped it around under iCAP and said we want to know when you’re ready to fly your crew and put your people at risk. And that then becomes something that we’re able to evaluate.”

“In the end all our partners want to fly safe. They’re not going to take any shortcuts on flying safe,” he elaborated. “All of us have the same initiative and it doesn’t matter who’s sitting on top of the vehicle. It’s a person, and that person needs to fly safely and get back home to their families. That’s the mission of all our folks and our partners – to go back home and see their family.”

Given the nations fiscal difficulties and lack of bipartisan cooperation there is no guarantee that NASA will receive the budget it needs to keep the commercial crew program on track.

Indeed, the Obama Administrations budget request for commercial crew has been repeatedly slashed by the US Congress to only half the request in the past two years. These huge funding cuts have already forced a multi-year delay in the inaugural test flights and increased the time span that the US has no choice but to pay Russia to launch US astronauts to the ISS.

“The budget is going to be an extremely challenging topic, not only for this program but for all NASA programs,” said Phil McAlister, NASA Commercial Spaceflight Development director.

NASA is pursuing a dual track approach in reviving NASA’s human spaceflight program. The much larger Orion crew capsule is simultaneously being developed to launch atop the new SLS super rocket and carry astronauts back to the Moon by 2021 and then farther into deep space to Asteroids and one day hopefully Mars.

Ken Kremer

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Caption: Dream Chaser awaits launch atop Atlas V rocket

New Video Shows the GRAIL MoonKAM’s Final Looks at the Moon

Artist's conception of the twin GRAIL spacecraft, called Ebb and Flow. Credit: NASA/JPL-Caltech

As a fond farewell, here are some of the final images taken by the GRAIL MoonKAM educational cameras on board Ebb and Flow, the twin spacecraft for the mission. This footage was shot just three days prior to when the mission ended with the planned impacts on a rim of a crater near the lunar north pole. At that point in the mission, the spacecraft had lowered their orbit to only about 11 km above the lunar surface. While these images aren’t of the highest of resolution, they provide a great sense of what it would be like to orbit close to the Moon. Additionally, they are an inspiration to school children. With MoonKAM (Moon Knowledge Acquired by Middle School Students) the cameras took more than 115,000 total images of the lunar surface, and imaging targets were proposed by middle school students from across the country and the resulting images returned for them to study.

The two probes were purposely crashed into the Moon because they no longer had enough altitude or fuel to continue science operations.

What Craters on the Moon Teach Us About Earth

When the Moon was receiving its highest number of impacts, so was Earth. Credit: Dan Durda

Some questions about our own planet are best answered by looking someplace else entirely… in the case of impact craters and when, how and how often they were formed, that someplace can be found shining down on us nearly every night: our own companion in space, the Moon.

By studying lunar impact craters both young and old scientists can piece together the physical processes that took place during the violent moments of their creation, as well as determine how often Earth — a considerably bigger target — was experiencing similar events (and likely in much larger numbers as well.)

With no substantial atmosphere, no weather and no tectonic activity, the surface of the Moon is a veritable time capsule for events taking place in our region of the Solar System. While our constantly-evolving Earth tends to hide its past, the Moon gives up its secrets much more readily… which is why present and future lunar missions are so important to science.

linne_shade_scalebTake the crater Linné, for example. A young, pristine lunar crater, the 2.2-km-wide Linné was formed less than 10 million years ago… much longer than humans have walked the Earth, yes, but very recently on lunar geologic terms.

It was once thought that the circular Linné (as well as other craters) is bowl-shaped, thus setting a precedent for the morphology of craters on the Moon and on Earth. But laser-mapping observations by NASA’s Lunar Reconnaissance Orbiter (at right) determined in early 2012 that that’s not the case; Linné is actually more of a truncated inverted cone, with a flattened interior floor surrounded by sloping walls that rise up over half a kilometer to its rim.

On our planet the erosive processes of wind, water, and earth soon distort the shapes of craters like Linné, wearing them down, filling them in and eventually hiding them from plain sight completely. But in the Moon’s airless environment where the only weathering comes from more impacts they retain their shape for much longer lengths of time, looking brand-new for many millions of years. By studying young craters in greater detail scientists are now able to better figure out just what happens when large objects strike the surface of worlds — events that can and do occur quite regularly in the Solar System, and which may have even allowed life to gain a foothold on Earth.

Most of the craters visible on the Moon today — Linné excluded, of course — are thought to have formed within a narrow period of time between 3.8 and 3.9 billion years ago. This period, called the Late Heavy Bombardment, saw a high rate of impact events throughout the inner Solar System, not only on the Moon but also on Mars, Mercury, presumably Venus and Earth as well. In fact, since at 4 times its diameter the Earth is a much larger target than the Moon, it stands to reason that Earth was impacted many more times than the Moon as well. Such large amounts of impacts introduced material from the outer Solar System to the early Earth as well as melted areas of the surface, releasing compounds like water that had been locked up in the crust… and even creating the sorts of environments where life could have begun to develop and thrive.

(It’s been suggested that there was even a longer period of heavy impact rates nicknamed the “late late heavy bombardment” that lingered up until about 2.5 billion years ago. Read more here.)

In the video below lunar geologist David Kring discusses the importance of impacts on the evolution of the Moon, Earth and eventually life as we know it today:

“Impact cratering in Earth’s past has affected not only the geologic but the biologic evolution of our planet, and we were able to deduce that in part by the lessons we learned by studying the Moon… and you just have to wonder what other things we can learn by going back to the Moon and studying that planetary body further.”

– David Kring

David is a senior staff scientist at the Lunar and Planetary Institute in Houston, TX.

It’s these sorts of connections that make lunar exploration so valuable. Keys to our planet’s past are literally sitting on the surface of the Moon, a mere 385,000 km away, waiting for us to just scoop them up and bring them back. While the hunt for a biological history on Mars or resource-mining an asteroid are definitely important goals in their own right, only the Moon holds such direct references to Earth. It’s like an orbiting index to the ongoing story of our planet — all we have to do is make the connections.

 

Learn more about lunar research at the LPI site here, and see the latest news and images from LRO here.

New Moon Dates, 2013 / 2014

The New Moon occurs when the Moon and Sun are at the same geocentric ecliptic longitude. The part of the Moon facing us is completely in shadow then. Pictured here is the traditional New Moon, the earliest visible waxing crescent, which signals the start of a new month in many lunar and lunisolar calendars. Credit: NASA Goddard SVC

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Here is the schedule for all the New Moons that will happen in 2013 and 2014. If you’re going to go skywatching, remember that the best time to see the night sky is when you have a new moon. When there’s a full moon, the dimmer skies are washed out. Please note that all the times listed are in Universal Time, also known as Greenwich Mean Time.

New Moons for 2013

New Moon for January, 2013

  • January 11, 19:44

New Moon for February, 2013

  • February 10, 7:20

New Moon for March, 2013

  • March 11, 19:51

New Moon for April, 2013

  • April 10, 09:35

New Moon for May, 2013

  • May 10, 00:28

New Moon for June, 2013

  • June 8, 15:56

New Moon for July, 2013

  • July 8, 07:14

New Moon for August, 2013

  • August 6, 21:51

New Moon for September, 2013

  • September 5, 11:36

New Moon for October, 2013

  • October 5, 00:34

New Moon for November, 2013

  • November 3, 12:50

New Moon for December, 2013

  • December 3, 00:22

New Moons for 2014

New Moon for January, 2014

  • January 1, 11:14
  • January 30, 21:38

New Moon for February, 2014

  • None

New Moon for March, 2014

  • March 1, 08:00
  • March 30, 18:45

New Moon for April, 2014

  • April 29, 06:14

New Moon for May, 2014

  • May 28, 18:40

New Moon for June, 2014

  • June 27, 08:08

New Moon for July, 2014

  • July 26, 22:42

New Moon for August, 2014

  • August 25, 14:13

New Moon for September, 2014

  • September 24, 06:14

New Moon for October, 2014

  • October 23, 21:57

New Moon for November, 2014

  • November 22, 12:32

New Moon for December, 2014

  • December 22, 01:36

You can listen to a very interesting podcast about the formation of the Moon from Astronomy Cast, Episode 17: Where Did the Moon Come From?

Reference:
US Naval Observatory

Full Moon Dates for 2013 / 2014

A photo of the full moon, taken from Apollo 11 on its way home to Earth, from about 18,520 km (10,000 nm) away. Credit: NASA
A photo of the full moon, taken from Apollo 11 on its way home to Earth, from about 18,520 km (10,000 nm) away. Credit: NASA

[moon_app]

Here is the schedule for all the Full Moons that will happen in 2013 and 2014. If you’re going to go skywatching, remember that the best time to see the night sky is when you have a new moon. When there’s a full moon, the dimmer skies are washed out. Please note that all the times listed are in Universal Time, also known as Greenwich Mean Time.

Full Moons for 2013

Full Moon for January, 2013

  • January 27, 04:38

Full Moon for February, 2013

  • February 25, 20:26

Full Moon for March, 2013

  • March 27, 09:27

Full Moon for April, 2013

  • April 25, 19:57

Full Moon for May, 2013

  • May 25, 04:25

Full Moon for June, 2013

  • June 23, 11:32

Full Moon for July, 2013

  • July 22, 18:15

Full Moon for August, 2013

  • August 21, 01:45

Full Moon for September, 2013

  • September 19, 11:13

Full Moon for October, 2013

  • October 18, 23:38

Full Moon for November, 2013

  • November 17, 15:16

Full Moon for December, 2013

  • December 17, 9:28

Full Moons for 2014

Full Moon for January, 2014

  • January 16, 04:52

Full Moon for February, 2014

  • February 14, 23:53

Full Moon for March, 2014

  • March 16, 17:08

Full Moon for April, 2014

  • April 15, 07:42

Full Moon for May, 2014

  • May 14, 19:16

Full Moon for June, 2014

  • June 13, 04:11

Full Moon for July, 2014

  • July 12, 11:25

Full Moon for August, 2014

  • August 10, 18:09

Full Moon for September, 2014

  • September 9, 1:38

Full Moon for October, 2014

  • October 8, 10:51

Full Moon for November, 2014

  • November 6, 22:23

Full Moon for December, 2014

  • December 6, 12:27

You can listen to a very interesting podcast about the formation of the Moon from Astronomy Cast, Episode 17: Where Did the Moon Come From?

Reference:
US Naval Observatory