November 20th, 2012
04:55 PM ET

Overheard: Time to send an astronaut to Mars?

By Claire Colbert, CNN

Our readers were certainly intrigued by initial measurements from the Mars rover Curiosity recently, which indicated that radiation levels on Mars are not lethal to humans. More research needs to be done to determine exactly how much radiation exposure a visit to Mars would entail, however.

Curiosity has been on Mars since August 6. For several weeks it had been parked at a place called Rocknest, but on November 16 the rover started driving again, NASA said. Currently it's on its way to a location called Point Lake.

As we continue to chart its activities here at CNN Light Years, it seems that every new discovery that the rover makes rekindles the debate about the importance, or lack thereof, of NASA.


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Double Prominence Eruptions
November 20th, 2012
10:51 AM ET

Double Prominence Eruptions

"The Sun erupted with two prominence eruptions, one after the other over a four-hour period on Nov. 16, 2012. The action was captured in the 304 Angstrom wavelength of extreme ultraviolet light. It seems possible that the disruption to the Sun’s magnetic field might have triggered the second event since they were in relatively close proximity to each other. The expanding particle clouds heading into space do not appear to be Earth-directed."

Source: NASA

Filed under: Light up the screen


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