Hi, I will use a direct approch for solving a trajectory optimization problem(optimal control). I find some approches for this , I have some queations, If it...

Here are some space related predictions for the year 2005. The return to flight of the space shuttle will proceed on schedule and without a hitch. By the end...

....Thanks to this latest botched root canal, yours truly is too doped up on antibiotics and *not* feeling any pain so as to require pain killers, so 2005 was...

No communications link to the probe after release? No way to ever know what happened to it unless the orbiter gets data from the descent? Is this going to be...

Just a note to wish you all a Happy New Year. Christopher +++++++++++ "Never take anything for granted." Benjamin Disraeli

Spaceflightnow is reporting that the inaugural Delta IV Heavy vehicle underperformed so much, probably during the boost phase, that the upper stage probably...

Greetings, As we move towards 2005 there has been a certain amount of introspection regarding the direction of space exploration as we close out the first...

The BBC is reporting that after the 2006 contract completion, the Russian space agency will only fly US astronauts on a commercial basis. They didn't say...

http://www.pej.org/html/modules.php?op=modload&name=News&file=article&sid=1337&mode=thread&order=0&thold=0 "Legal experts say they believe the three are the...

I recieved Starchaser's new supports magazine yesterday, and it contained a very whinny response to Burt winning the X-prize is. Basically they moan that...

The new Delta IV-H and (possible) Delta V-H ELV's still fall far short of the performance of the Saturn V moon rocket. At the moment they have about a quarter...

Nate Douglas Editor, RVR (http://home.mn.rr.com/rvr/) Dec. 10, 2004 FOX News- whether they are "fair and balanced," the Fox News Team is quite a group of...

According to nasawatch.com, the names still in play are "Steidle and Walker, and to a lesser extent, Kadish and Worden (despite Brownback's endorsement)." A...

Time now for the year in space awards. I've been struggling with some of these categories so, in the spirit of wussing out, I have decided to divide them into...

It is likely that, with efficient compression, alien radio data will be indistiguishable from white noise. So, even if we can pick up the radio...

I am unable to get the actual updated orbital elements right now (hmm... overloaded webservers...) but the JPL NEO webpage now is indicating that today's...

This booster is beginning to look really impressive to me -- the recent launch holds don't bother me at all. In its current and EXPANDABLE forms, is this the...

If you're trying to explain to someone the level of risk associated with today's probability estimate of 0.027 for a collision with 2004 MN4, try roulette. ...

December 27, 2004 Anyone who still thinks that evidence of past microscopic and/or macroscopic life has not, or will not, be discovered by the MER...

Our main man Thomas writes: Anyone who still thinks that evidence of past microscopic and/or macroscopic life has not, or will not, be discovered by the...