Sentences with phrase «planetary scientists believed»

But when NASA's MESSENGER spacecraft detected lots of sulfur and potassium in the crust of Mercury earlier this year, many planetary scientists believed this ruled out the giant - impact scenario for the innermost planet.

Oceans on both planets filled up early on, planetary scientists believe.

Planetary scientists believe that the solar system formed approximately 4.6 billion years ago.

Not exact matches

Scientists have long believed that the early solar system began with four planetary cores that went on to grab all of the gas around them, forming the four gas planets — Jupiter, Saturn, Uranus, and Neptune.

Taken together, the two results make a compelling case for young rings, says Larry Esposito, a planetary scientist also at CU Boulder who has long believed the rings to be old.

The south pole also intrigues planetary scientists who believe some of the rocks there may have originated deep within the lunar interior.

I am not aware of any planetary scientist who believes that these features are anything more than natural formations.One problem with using the Viking images as proof of something is that they are low resolution.

«This is why we explore,» said NASA Planetary Science Director Jim Green at Headquarters in Washington, D.C. «For years, scientists believed that Mercury's tectonic activity was in the distant past.

Continuing to use fossil fuel power sources is not tenable, since our best scientists believe that this will lead to planetary catastrophe.

The Paris accord, agreed by nearly 200 countries in 2015, seeks to limit planetary warming by curbing global emissions of carbon dioxide and other gases that scientists believe drive global warming.

These data points help show why it is that scientists believe that planetary temperatures, sea levels and carbon dioxide levels all tend to rise and fall together — and thus, why Earth is now headed back toward a period like the mid-Pliocene or even, perhaps, the Miocene, if current trends continue.