The softball-sized drone will begin its first mission in early 2021.
One small drink for man, one giant party for mankind.
By probing Mars' interior, this mission could teach us about how our solar system's planets formed.
The rover was supposed to find the supplies future lunar astronauts would need.
TESS will focus on nearby planets worthy of further study.
Hello DARKNESS my old friend...
Reminder: the Moon is very, very awesome.
Getting knocked up in space might be possible after all.
Test flights may start in 2021.
NASA officials say the delay is about "getting it right."
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