Aerospace

Comet McNaught Transits SOHO

This is simply extraordinary . . . We’re in awe.

Brightest Comet in Over Forty Years

Comet McNaught (C/2006 P1) has not only become the brightest comet SOHO has ever seen, but even the brightest comet observed in over forty years! The comet swung by the sun on Jan 12th – 15th, and is now emerging into the skies of the southern hemisphere. During its close encounter with our mother star, comet McNaught became a naked-eye object in broad daylight. It was discovered on August 7th, 2006 by the hugely successful comet discoverer Rob McNaught (Siding Spring Survey). At time of discovery, the comet was a very faint object, but the predicted perihelion distance (closest distance to the sun) of just 0.17 AU indicated already that the object had the potential to become very bright.

As you are probably aware, the LASCO instrument on-board SOHO has the ability to watch comets as they get extremely close to the Sun. Fortunately for us, comet McNaught has passed right through the LASCO C3 field of view! We do not know exactly the peak brightness of the comet yet, but it is definitely brighter than -3 mag! It is thus much brighter than comet NEAT or comet 96P/Machholz. In other words, comet McNaught is by far the brightest and most spectacular comet SOHO has ever seen!

Google Meets NASA

I worry when a large, politically left-leaning enterprise like Google teams up with a government bureaucracy like NASA. True, I support most of the Space Programs, but wonder if this will pan out.

Google and NASA Ames will focus on making the most useful of NASA’s information available on the Internet. Real-time weather visualization and forecasting, high-resolution 3-D maps of the moon and Mars, real-time tracking of the International Space Station and the space shuttle will be explored in the future.

Well, it sounds like fun, but . . .

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Does Mars Leak Water?

NASA Scientists announced today that there is compelling evidence that liquid water flows on Mars: From NASA:

NASA Images Suggest Water Still Flows in Brief Spurts on Mars

NASA photographs have revealed bright new deposits seen in two gullies on Mars that suggest water carried sediment through them sometime during the past seven years.

“These observations give the strongest evidence to date that water still flows occasionally on the surface of Mars,” said Michael Meyer, lead scientist for NASA’s Mars Exploration Program, Washington.

Image right: A new gully deposit in a crater in the Centauri Montes Region. Image credit: NASA/JPL/Malin Space Science Systems

Liquid water, as opposed to the water ice and water vapor known to exist at Mars, is considered necessary for life. The new findings heighten intrigue about the potential for microbial life on Mars. The Mars Orbiter Camera on NASA’s Mars Global Surveyor provided the new evidence of the deposits in images taken in 2004 and 2005.

“The shapes of these deposits are what you would expect to see if the material were carried by flowing water,” said Michael Malin of Malin Space Science Systems, San Diego. “They have finger-like branches at the downhill end and easily diverted around small obstacles.” Malin is principal investigator for the camera and lead author of a report about the findings published in the journal Science.

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Death of a Comet


Did you ever see a comet plunge into the sun? Not likely unless you have seen images from the Solar and Heliospheric Observatory (SOHO). Watch as the comet strikes the heliosphere and causes a solar explosion.

Image: Courtesy NASA and SOHO

Spaceweather.com says:

Yesterday, the Solar and Heliospheric Observatory (SOHO) caught a comet plunging toward the sun. It went in–but not out again. The sungrazing comet disintegrated like an ice cube in an oven.

In the animation, the white circle represents the outline of the sun. The dark circle is a shield in the optics to block the solar image so background activity and objects may be seen. Above and to the left is the planet Venus which just passed above and in front of the Sun. In a wider field of view image, the planet Mars can also be seen along with labels explaining the image.

NASA Goes to IRAQ

When I first read the NASA article Sci-fi Life Support, I missed the textbox at the bottom. When I went back to post about the system, I found out that this built-for-space wastewater reclamation system is currently in use in provinces of Northern Iraq.

The article itself describes a spaceborne system designed to recover up to 93 percent of water from exhaled air and urine. Such a system will be needed for long manned space missions and in remote outposts such as Lunar or Martian bases.

Here’s the story about the Earthbound version:

ECLSS in Iraq — Since April 2006, an Earth-bound application of a portion of the ECLSS water recovery system is being trucked from one rural village to another in northern Iraq to filter particulates and contaminants out of dirty groundwater or well water to provide residents with clean drinking water. That portable system—about half the size of a refrigerator including all its pumps and computer controls—purifies water at a good clip of 4 gallons a minute, for a cost of only about two cents a gallon.

Image: ECLSS Hardware (courtesy NASA)

Technical details of ECLSS appear in “Status of the Regenerative ECLSS Water Recovery and Oxygen Generation Systems” by Robert M. Bagdigian, Dale Cloud, and John Bedard (Paper 2006-01-2057) and in NASA Facts “International Space Station Environmental Control and Life Support System” (Pub 8-40399, May 2005).

ECLSS fact sheet

The Vision for Space Exploration

Watching the Sun in STEREO

The twin spacecraft mission STEREO blasted off from Cape Canaveral in a nighttime launch last night. STEREO, which stands for Solar TErrestrial RElations Observatory, is a two-spacecraft mission to observe solar activity from two vantage points in orbit around the sun. the spacecraft, identified as A (ahead) and B (behind), will head for the Moon to get a gravitational “slingshot” into orbit. B will be flung into orbit behind the Earth while A will return to the Moon for another boost into orbit ahead of Earth. This separation in space provides a unique view of the Sun from orbits with a similar distance from the Sun as the Earth, while imaging from points away from our planet. The spacecraft will assume their stations near Lagrange points L4 and L5.

Image right: STEREO Night Launch – courtesy NASA

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