Understanding Evolution: your one-stop source for information on evolution
Resource library Teaching materials Evolution 101 Support this project


Formation of Our Solar System

Ingredients for Life


Research Profiles


print print

A Place for Life: A Special Astronomy Exhibit of Understanding Evolution

The Formation of Our Solar System

Protoplanetary disks in the Orion Nebula
Protoplanetary disks in the Orion Nebula. These embryonic planetary systems consist of rotating disks of gas and dust surrounding young stars. Our own Sun and Solar System formed in an environment similar to this.

All life on Earth shares a common chemistry. The bodies of dogs, dragonflies, dinosaurs, and diatoms are made up of carbon, calcium, oxygen, and a few other common elements. This material has been recycled over and over since life on Earth began. Some of the atoms that make up your body now were once a part of rocks, air, oceans, and other organisms that died long ago. But where did these raw materials come from in the first place? To answer that, we have to look at where the stuff of which our planet is made came from.

Our Earth formed, along with the Sun and the rest of the Solar System, approximately 4.6 billion years ago, from a cloud of gas and space dust known as a nebula. Astronomical observations have revealed huge numbers of nebulae, as well as stars of many different types at different stages in their lives, in our own Galaxy and beyond. Just like biologists, astronomers seek to understand the diversity of the subjects of their study first by classifying them. And as for biologists, studying birth, life, death, and environment are critical for astronomers.

Protoplanetary disks in the Orion Nebula image credit: NASA, ESA and L. Ricci (ESO).

page 1 of 9
previous | next  >

More details

Revolutionary ALMA Image Reveals Planetary Genesis

Everything You Need to Know About Planet Earth