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ToSeek
2003-Dec-03, 03:45 PM
http://www.esa.int/export/SPECIALS/Mars_Express/SEMN3GUZJND_0.html

Amadeus
2003-Dec-03, 03:46 PM
3.... 2..... 1.......

Woo Woos claim it to be planet X yet?

Diamond
2003-Dec-03, 03:49 PM
And I hear the first sensor readings show that Mars is made of "caramel, sugar and thick, dark chocolate" 8-[

Amadeus
2003-Dec-03, 03:53 PM
I would have guessed Red Leister cheese myself :lol:

kucharek
2003-Dec-03, 03:54 PM
3.... 2..... 1.......

Woo Woos claim it to be planet X yet?

Caution!" The BA doesn't allows countdowns on his board!

:lol:

Amadeus
2003-Dec-03, 03:55 PM
Sorry #-o
1..... 2....... 3.......

How about a countup :lol:

Anyway sorry to hijack a thread. Cool picture. Nice to see mars from a different angle.

bob wheeling
2003-Dec-03, 04:07 PM
I've got a question about that picture. The diagrams I've seen of the trajectories for the current flock of missions shows the probes and the planets moving in a counter-clockwise direction. I guess I'm making an assumption that the diagrams are from the top looking down (like looking from the direction of (roughly) the earth's north pole). If the probes are catching up with mars from that direction, shouldn't the illuminated side of the picture be on the left? That would be the direction of the center of the orbit, hence the sun, wouldn't it? I haven't decided if I think the picture is upside down or if it is reversed, but I sure think the wrong side of mars is lit up.

Kaptain K
2003-Dec-03, 04:16 PM
The Mars Express is on a Hohman trajectory (An ellipse with its perhelion at the Earth's orbit and aphelion at Mar's orbit). It is actually ahead of Mars (as seen from the Sun) and Mars is catching up to it.

Mainframes
2003-Dec-03, 04:19 PM
The Mars Express is on a Hohman trajectory (An ellipse with its perhelion at the Earth's orbit and aphelion at Mar's orbit). It is actually ahead of Mars (as seen from the Sun) and Mars is catching up to it.

Here's a picture that shows it nice and clearly:

http://mars.jpl.nasa.gov/mer/mission/spiritrightnow.html

bob wheeling
2003-Dec-03, 04:21 PM
That makes sense. Thank-you.

PB
2003-Dec-04, 03:10 AM
When Galileo was approaching Jupiter I was puzzled for awhile because some diagrams showed the spacecraft coming in from the right but I knew that it was arriving the same way that MER is doing at Mars. Finally it dawned on me that it was a Jupiter-centric view and the reason Galileo appeared to be coming from the right was because Jupiter moving faster and was catching up to the position of Galileo. A similar view is show for the approach of Cassini to Saturn
http://solarsystem.dlr.de/PG/cassini/images/cassini_soi2tc.JPG

sarongsong
2003-Dec-04, 05:55 AM
Nice!
Somewhat relatedly, Phobos Over Mars on APOD a few days ago:
http://antwrp.gsfc.nasa.gov/apod/ap031129.html

imax
2003-Dec-04, 11:15 PM
Cool, when will we see more pictures? :D

George
2003-Dec-06, 01:41 PM
Both sites are great. Thanks! =D>

Nice to see little Phobos get in the picture.

ToSeek
2003-Dec-18, 05:03 PM
The View From Mars Express (http://antwrp.gsfc.nasa.gov/apod/ap031218.html) (as of December 3)