Here in southern New England, the land of four distinct seasons, spring is on our doorstep. This month's vernal equinox, the moment the sun crosses the equator from south to north, comes at 10:46 a.m.
Astronomy on MSN
How often does Earth transit the Sun for an observer on Mars?
If I were on Mars, how often would I see Earth transit the Sun? Steven RiserConyers, Georgia From Mars, Earth transits the ...
American space companies Interlune and Venturi Astrolab partnered to test a lunar excavator on the Flexible Logistics and Exploration (FLEX) rover.
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