Astronomers Radically Reimagine the Making of the Planets

Start at the center, with the sun. Our middle-aged star may be more placid than most, but it is otherwise unremarkable. Its planets, however, are another story.

First, Mercury: More charred innards than fully fledged planet, it probably lost its outer layers in a traumatic collision long ago. Next come Venus and Earth, twins in some respects, though oddly only one is fertile. Then there’s Mars, another wee world, one that, unlike Mercury, never lost layers; it just stopped growing. Following Mars, we have a wide ring of leftover rocks, and then things shift. Suddenly there is Jupiter, so big it’s practically a half-baked sun, containing the vast majority of

→ Continue reading at Wired - Science

More from author

Related posts

Advertisment

Latest posts

Partner of killed Ukrainian journalist explains why she wanted to see photo of his body – CNN Video

Most stock quote data provided by BATS. Market indices are shown in real time, except for the DJIA, which is delayed by two minutes....

What’s the impact of a Russian debt default?

By The Associated PressRussia is poised to default on its foreign debt for the first time since the 1917 Bolshevik Revolution, further alienating the...

Biden urges Western unity on Ukraine amid war fatigue

By Zeke Miller, Darlene Superville and Geir Moulson | Associated PressELMAU, Germany — President Joe Biden and Western allies opened a three-day summit in...