Imaginea Astronomica a Zilei

Descopera cosmosul! In fiecare zi este prezentata o noua imagine sau fotografie a universului nostru fascinant, insotita de o explicatie scurta din partea unui astronom profesionist.

December 4, 1999
See Explanation.  Clicking on the picture will download 
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Mars Polar Lander Target Ellipse
Picture Credit: Malin Space Science Systems, MGS, JPL, NASA

Explicatie: (Edit) South is up in this recent composite color picture of Mars Polar Lander's target region near the Martian South Pole taken on November 28. Imaged by the orbiting Mars Global Surveyor's wide angle camera, the area covered is 105 kilometers across with the expected landing ellipse superposed. It is late spring in Mars' southern hemisphere and white patches near the top are what remains of the area's winter frost while dark areas are likely sand and fields of sand dunes. The Mars Polar Lander spacecraft reached the Red Planet yesterday at 20:00 UTC and earthbound controllers are still trying to establish contact with the lander during the available communication windows. From orbit, the Mars Global Surveyor spacecraft will try to contact the two basketball-sized microprobes jettisoned during the lander's descent.

Imaginea de maine: Saturnian Moon

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Autori & editori: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
Reprezentanti tehnici NASA: Jay Norris. Specific rights apply.
Un serviciu al: LHEA at NASA/ GSFC
& Michigan Tech. U.