SCIENCE
11/05/2015 02:23 pm ET Updated Nov 11, 2015

NASA Makes Major Discovery About Atmosphere On Mars

Solar wind stripped the red planet of its atmosphere, scientists say.

An Earth-like atmosphere on Mars was once violently stripped away by solar wind, according to new findings from NASA's ongoing exploration of the red planet.

In a press conference on Thursday, the space agency confirmed that solar wind currently is stripping away gas at a rate of about 100 grams every second, and this played a major role in the disappearance of the red planet's atmosphere and water billions of years ago.

The discovery, which was published in the journals Science and Geophysical Research Letters, sheds new light on how the planet evolved from having an early, warm and wet environment that might have hosted life to becoming the cold, arid world we see today. Solar winds may have not had the same effect on Earth, because of our planet's strong magnetic fields.

"If you look at Mars today, it's a cold, dry desert planet," Michael Meyer, lead scientist for the Mars Exploration Program at NASA Headquarters, said during the conference. "What happened?... The answer, my friend, is blowing in the wind."

NASA scientists have been examining and analyzing the upper atmosphere on Mars using the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft.

Watch the announcement above, and scroll down for the latest comments.

“Mars appears to have had a thick atmosphere warm enough to support liquid water which is a key ingredient and medium for life as we currently know it... Understanding what happened to the Mars atmosphere will inform our knowledge of the dynamics and evolution of any planetary atmosphere.” John Grunsfeld, associate administrator for the NASA Science Mission Directorate
A look into the past when Mars may have had abundant water some 3.7 billion years ago.
NASA
A look into the past when Mars may have had abundant water some 3.7 billion years ago.
"When we want to learn about life and the potential for life, we have to study the atmosphere, the geology, and the upper atmosphere to learn about the history of the climate and what drove climate change on Mars... Mars appears to meet all of the conditions required for life, or to have met them at the surface in the past, and that begs the question of whether there ever was life there" Bruce Jakosky, Mars Atmosphere and Volatile Evolution principal investigator
The solar wind hitting Mars, stripping away its atmosphere. The color shows the density of particles in the solar wind.
NASA
The solar wind hitting Mars, stripping away its atmosphere. The color shows the density of particles in the solar wind.
The sun releases particle winds, causing some atmospheric loss on Mars.
NASA
The sun releases particle winds, causing some atmospheric loss on Mars.
Earth has a magnetic field that protects its atmosphere, whereas Mars does not have that protection.
NASA
Earth has a magnetic field that protects its atmosphere, whereas Mars does not have that protection.
On the right, Mars being hit by solar winds. On the left, Mars during a solar storm.
NASA
On the right, Mars being hit by solar winds. On the left, Mars during a solar storm.
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Is there recent flowing water on Mars?
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