One hundred and seventy-one days into its 172-day journey to
comet Tempel 1, NASA's Deep Impact spacecraft successfully
released its impactor. The separation of flyby spacecraft and the
washing-machine-sized, copper-fortified impactor was one in a
series of important mission milestones that capped off its
successful encounter with the comet at 10:52 p.m. Sunday, PDT.
The early images pointed to a smashing success, with bright
ejecta and a massive dust cloud of rock and ice.
The Pause before the Crash
The Deep Impact spacecraft is nearing the comet Tempel 1. On
Sunday, July 3, a smaller spacecraft will separate from the
mothership, ready to sacrifice its life for the benefit of
cometary scientists everywhere.
New Planet, Largest Solid Core
NASA researchers recently discovered the largest solid core ever
found in an extrasolar planet, and their discovery confirms a
planet formation theory.
Mars in Pop Culture: Radio
Historically, Mars was thought to be the most likely of the
planets to harbor life. Popular culture in the form of
literature, and then later radio and film, reflected such
beliefs. This review examines Mars in the history of radio.
Monday, July 04