Jan 14, 2025 · The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now—and it is still stretching!

Jan 14, 2025 · All About the Sun. The light of daytime comes from our closest star: the Sun. Learn more about it! explore

Jan 14, 2025 · NASA science games, articles and activities for kids

Jan 14, 2025 · El Big Bang es cómo los astrónomos explican la forma en que comenzó el universo. Es la idea de que el universo comenzó como un solo punto, luego se expandió y se estiró para crecer tanto como lo es ahora, ¡y todavía se está extendiendo!

Jan 14, 2025 · This is a picture taken by the NASA’s James Webb Space Telescope showing thousands of galaxies. This image covers a patch of sky approximately the size of a grain of sand held at arm’s length by someone on the ground. The universe is a very big place! Credit: NASA, ESA, CSA, and STScI. Some galaxies are spiral-shaped like ours.

Jan 14, 2025 · What Is the Big Bang? Why do we call it that? explore; What Is Dark Matter? and dark energy, too! explore; What Is a Light-Year? A light-year is the distance light travels in one Earth year. Learn about how we use light-years to measure the distance of objects in space. explore; The Amazing Hubble Telescope

Jan 14, 2025 · It is the "noise" left from shortly after the Big Bang that began the universe billions of years ago. The different colors represent very tiny differences in energy that eventually resulted in matter clumping together into galaxies and even bigger structures throughout the universe.

Jan 14, 2025 · The layer we call home. Closest to the surface of Earth, we have the troposphere.“Tropos” means change.This layer gets its name from the weather that is constantly changing and mixing up the gases in this part of our atmosphere.

The Milky Way is an ancient galaxy that was born only a few hundred million years after the Big Bang. Credit: NASA/JPL Most galaxies are between 10 billion and 13.6 billion years old.

Jan 14, 2025 · What does this mean for time travel? Well, according to this theory, the faster you travel, the slower you experience time. Scientists have done some experiments to show that this is true. For example, there was an experiment that used two clocks set to the exact same time.