planetesimals

White Dwarfs are Often Polluted With Heavier Elements. Now We Know Why

When stars exhaust their hydrogen fuel at the end of their main sequence phase, they undergo core collapse and shed…

4 weeks ago

What Happens to Solar Systems When Stars Become White Dwarfs?

In a couple billion years, our Sun will be unrecognizable. It will swell up and become a red giant, then…

2 months ago

The Meteorites That Made Earth Were Filled With Water

According to the most widely accepted scientific theory, our Solar System formed from a nebula of dust and gas roughly…

5 months ago

Planetesimals Are Buffeted by Wind in their Nebula, Throwing Debris into Space

Before planets form around a young star, the protosolar disk is populated with innumerable planetesimals. Over time, these planetesimals combine…

5 months ago

Arrokoth is Covered in Bizarre Mounds

When New Horizons flew past Arrokoth in 2019, it revealed close-up images of this enigmatic Kuiper Belt Object for the…

8 months ago

Earth’s Water is 4.5 Billion Years Old

The origin of Earth's water has been an enduring mystery. There are different hypotheses and theories explaining how the water…

1 year ago

Asteroids Didn’t Create the Moon’s Largest Craters. Left-Over Planetesimals Did

The Moon's pock-marked surface tells the story of its history. It's marked by over 9,000 impact craters, according to the…

2 years ago

A Group of Meteorites All Came From a Destroyed Planetesimal With a Magnetic Core

Before our Solar System had planets, it had planetesimals. Scientists think that most of the meteorites that have struck Earth…

4 years ago

Interstellar Asteroid ‘Oumuamua Had a Violent Past

According to the latest study by a team that has been observing 'Oumuamua since it was first discovered, this interstellar…

6 years ago

Finally, the Missing Link in Planetary Formation!

A new study by an international team of scientists may be the "missing link" in our understanding of how planets…

7 years ago