How Our Solar System and Earth Were Made!

Imagine a giant cloud of dust and gas that spun and swirled to create our amazing Sun and all the planets, including our home, Earth!

Images

Peaking Into the Dark

Peaking Into the Dark

openverse
Three’s a crowd (Both)
Three’s a crowd
Hubble Sees Elegant Spiral Hiding a Hungry Monster
Hubble’s Galaxies With Knots, Bursts
The Closest Apollo 16 Moon Rock Match — Gadamis 004
Hubble Detects a Dangerous Dance
Hubble Traces a Galaxy’s Outer Reaches
A Star-Formation Laboratory
Festive Nebulas Light Up Milky Way Galaxy Satellite
Hubble Observes Galaxies' Evolution in Slow Motion
Hubble Views a Young Elliptical Galaxy

Key Facts

Solar System Age
About 4.6 billion years old.
Earth's Formation
Formed from a spinning disk of gas and dust around the young Sun.
Sun's Role
The Sun's gravity keeps all the planets in their paths.
Water's Arrival
Water likely arrived on Earth through comets and asteroids.

A Cosmic Dust Bunny Party!

A super, super long time ago, before there were any stars or planets, there was a giant cloud made of dust and gas. This cloud was HUGE! Then, something made it start to spin, like when you spin around really fast. As it spun, it got flatter and flatter, like a giant pancake. In the middle, all the stuff got squished together and became super hot, and POOF! Our Sun was born!

Planets Go Round and Round!

As the Sun was being made, there was still lots of dust and gas spinning around it. These little bits of dust started to bump into each other and stick together, like tiny snowballs rolling down a hill. They got bigger and bigger, forming rocks, then bigger rocks, and eventually, they became the planets! Our Earth is one of these amazing planets.

Earth Gets a Makeover!

When Earth first formed, it was a hot, messy place! It was like a giant ball of melted rock. Over millions and millions of years, it started to cool down. Then, something amazing happened: water came to Earth! This water helped make the planet just right for plants, animals, and even us to live on. It's like Earth got a special cozy blanket of air called an atmosphere.

Our Solar System Family!

Our Sun has a big family of planets that all travel around it. There's Mercury, Venus, Earth (that's us!), Mars, Jupiter, Saturn, Uranus, and Neptune. Some are rocky like Earth, and some are giant gas balls! They all formed from that same spinning cloud of dust and gas a very, very long time ago. It’s like a giant cosmic neighborhood!

Frequently Asked Questions

What is the solar nebula hypothesis?+
The solar nebula hypothesis says that about 4.6 billion years ago, a giant cloud of gas and dust collapsed and spun into a disk, eventually forming the Sun and planets.
How did the Sun form from the collapsing cloud?+
As the cloud collapsed, it spun faster and flattened into a disk; the center got hot and dense enough that nuclear fusion started, creating the Sun.
Why did the inner planets become rocky while the outer ones became gas giants?+
In the hot inner part of the disk only rock and metal could condense, so the inner planets are rocky; farther out, cooler temperatures let ices and gases form, making gas giants.
How did Earth get its oceans and atmosphere?+
Early Earth was molten, and volcanoes released gases that made a first atmosphere; later comets and asteroids brought water, forming oceans that helped life begin.
When did the solar system start forming?+
The collapse of the cloud began about 4.6 billion years ago, starting the formation of the Sun and planets.
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Based on content from Wikipedia · Licensed under CC BY-SA 4.0