Rocky Planets May Have Formed Just 100 Million Years After Big Bang

Topic: Space

Scientists from the University of Portsmouth found that rocky planets may have formed as early as 100 million years after the Big Bang. They used computer simulations to study how stars and supernovae affected the formation of planets.

The Big Bang happened about 13.8 billion years ago. Scientists thought that planets took much longer to form, but new research suggests they may have formed earlier than expected.

Some of the earliest stars were massive and exploded in violent events called supernovae. These explosions spread heavy elements like carbon, oxygen, and iron into space. This material is necessary for making planets and life.

Dr. Daniel Whalen from the University of Portsmouth said that their research shows that rocky planets can form around low-mass stars in the debris of these early explosions. They used computer simulations to study how this process works.

One type of supernova, called a pair-instability supernova, can eject over 100 times the mass of the Sun's worth of heavy elements. This material can increase the abundance of heavy elements in nearby gas clouds. As gravity pulls these enriched clouds together, they can form rotating disks around young stars.

The simulations revealed that one such disk contained enough solid material to create several Earth-masses' worth of planetary building blocks. The disk also had a substantial supply of water, similar to the amount found in our own Solar System.

This means that any planets forming there could potentially have received water in a similar way to Earth.

Why It Matters

Understanding how planets form can help us learn more about the possibility of life existing elsewhere in the Universe. It also raises interesting questions about the history of our own planet and how it became habitable.

Key Facts

• Rocky planets may have formed as early as 100 million years after the Big Bang.
• The research was conducted by scientists from the University of Portsmouth.
• Computer simulations were used to study the formation of planets around low-mass stars.
• Supernovae explosions spread heavy elements into space, which are necessary for making planets and life.
• The disk formed in the simulation contained several Earth-masses' worth of planetary building blocks.

Key Terms

supernova

A massive star explosion that spreads heavy elements into space

protoplanetary disk

A rotating disk around a young star where planets can form

Implications

Understanding how planets form can help us learn more about the possibility of life existing elsewhere in the Universe. It also raises interesting questions about the history of our own planet and how it became habitable.