Space Forum / Space Science / September 2005

http://news.uns.purdue.edu/UNS/html4ever/2005/050927.Lipschutz.meteorites.htm
Meteorites offer glimpse of the early Earth, say Purdue scientists
Purdue University
September 27, 2005

Newly released pics of Hyperion show a crater impact which looks as if
it runs 2/3 the face of the moon, with very high crater walls.  Equally
eyecatching is the texture of the surface within the crater, to this
untrained eye it looks all the world like a huge piece of pumice.  It

http://www.umich.edu/news/?Releases/2005/Aug05/r081605c
Look out: Asteroid's near-miss may be home run for scientists
University of Michigan
August 16, 2005

-> >perihelions. But, in fact, their orbits are way out beyond Neptune,
-> >even at their perihelions.
-> Very good point!
-> Isn't that also true of Oort Cloud objects, only more so?

-> Referring to the recent discussion of the possibility that the
-> Earth/Moon pair had been the result of a collision between a Mars-sized
-> protoplanet and a Venus-sized one, I wonder if one of the results of
-> this impact was - in addition to cooling for the main mass - the ...

http://marsrovers.jpl.nasa.gov/mission/status.html#opportunity
OPPORTUNITY UPDATE: Approaching 'Erebus' - sol 586-591, Sept 22, 2005:
Opportunity is healthy and continuing its drive toward "Erebus Crater."
Images taken this week show the interior of the crater. Plans for the

http://marsrovers.jpl.nasa.gov/mission/status.html#opportunity
OPPORTUNITY UPDATE: Erebus Bound - sol 580-585, Sept 19, 2005:
Opportunity has resumed normal operations this week. The rover is
healthy and making progress towards "Erebus Crater." The rover team has

http://science.nasa.gov/headlines/y2005/22sep_doublemars.htm
Mars Doubles in Brightness
NASA Science News
September 22, 2005

8 Years at Mars #1: New Dune Gullies
MGS MOC Release No. MOC2-1220, 20 September 2005
http://www.msss.com/mars_images/moc/2005/09/20/dunegullies/index.html
The gullies seen on sand dunes prior to this were believed also to be

A couple of months ago, now, the ESA's Mars Express orbiter extended
its antennas in preparation for doing a radar survey that was
anticipated to reveal the presence of water beneath the Martian
surface.

-> at Padua, is the principal professor of philosophy whom I have  
-> repeatedly and urgently requested to look at the moon and planets  
-> through my glass, which he pertinaciously refuses to do. Why are you not  
-> here? What shouts of laughter we should have at this glorious ...

I have a small problem which I initially thought would be fairly easy to
work out.
Given a rocket or mass M ejecting as its exhaust a mass stream at a rate m,
and energy is imparted into this mass at a rate (power) of P, is it possible

This was an interesting article:
http://seattletimes.nwsource.com/html/nationworld/2002495810_asteroid15.html
Is Ceres the biggest repository of water in the solar system? I wonder
if that could make it into a port of call for spaceships travelling to

Deep Impact Spectra: Carbonate, PAHs and Some Amino Precursors in Comet
Tempel I.
© 2005 by Linda Moulton Howe
http://www.earthfiles.com/news/news.cfm?ID=960&category=Science

-> Hayabusa arrived at Itokawa on September 12. The distance between the
-> spacecraft and Itokawa is approximately 20 kilometers.  
How big is Itokawa?
20 kilometres is awfully close. If the asteroid is, say, 5 km in