Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://www.astronomy.com/magazine/2004/04/changing-mars
Äàòà èçìåíåíèÿ: Unknown
Äàòà èíäåêñèðîâàíèÿ: Sun Apr 10 02:59:20 2016
Êîäèðîâêà: ISO8859-5
Changing Mars | Astronomy.com
Tonight's Sky
Sun
ò??
ò??
Sun
Moon
ò??
ò??
Moon
ò??
ò??
Mercury
ò??
ò??
Mercury
ò??
Venus
ò??
ò??
Venus
ò??
Mars
ò??
ò??
Mars
ò??
Jupiter
ò??
ò??
Jupiter
ò??
Saturn
ò??
ò??
Saturn
ò??

Tonight's Sky ò?? Change location

OR

Searching...

Tonight's Sky ò?? Select location

Tonight's Sky ò?? Enter coordinates

ÒÀ '
ÒÀ '

Changing Mars

Exploring Mars by spacecraft destroyed an entire world that existed only in humankind's imagination — and it gave us a real world loaded with complexities.
Robert BurnhamThe exploration of Mars began earlier than many people think. Just three years after the launch of Sputnik in October 1957, the beginning of the space age, the first Mars probe was launched (by the Soviet Union, now Russia). It failed on launch, however — as did a second Soviet Mars launch attempt a few days later. Over succeeding years, the Soviets tried three more times, each flight failing one way or another. Meanwhile, the United States looked on, while making plans. Firs...

Already a subscriber? Register now!

Registration is FREE and takes only a few seconds to complete. If you are already registered on Astronomy.com, please log in below.
ADVERTISEMENT

FREE EMAIL NEWSLETTER

Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter.

ADVERTISEMENT
ADVERTISEMENT
asy_gravitational_eguide

Click here to receive a FREE e-Guide exclusively from Astronomy magazine.

Find us on Facebook