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“Comets”

Apr 29, 2016 02:00 PM ET // Irene Klotz
A distant tailless comet hails from inner solar system, but as its lack of ice shows, it's likely an ancient body, hailing from when the planets were being born.
Apr 18, 2016 01:52 PM ET // Ian O'Neill
Was the 1977 'Wow!' signal communications from an alien civilization? Or was it interference from a passing comet? In 2017, we may finally have an answer.
Apr 7, 2016 02:00 PM ET // Irene Klotz
The chemicals necessary for the formation of life have been detected in lab-grown comet ice -- a discovery that could have huge implications for discovering how life as we know it was spawned.
Mar 30, 2016 02:20 PM ET // Ian O'Neill
As astronomers track down more clues as to the existence of a large world orbiting the sun in the outer fringes of the solar system, a classic planetary purveyor of doom has been resurrected.
Mar 28, 2016 01:27 PM ET // Ian O'Neill
Comet P/2016 BA14 was initially thought to be a cosmic lightweight, but as it flew past Earth on March 22, NASA pinged it with radar to reveal just what a heavyweight it really is.
Mar 21, 2016 11:01 PM ET // Ian O'Neill
We are in the middle of a double comet encounter -- do astronomers view this unprecedented event as a worrying near-miss? Or is it an exciting opportunity to learn more about these mysterious icy objects?
Mar 18, 2016 05:12 PM ET // Ian O'Neill
The Discovery Channel Telescope has played a key role in identifying what could be one component of a comet twin -- both expected to fly past Earth later this month.
Mar 10, 2016 01:35 PM ET // Ian O'Neill
When Comet Siding Spring encountered Mars in 2014, it delivered a hefty magnetic punch.
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