Sep 25, 2025 · What Is the Big Bang? The Short Answer: The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single …

Sep 25, 2025 · NASA science games, articles and activities for kids

Sep 25, 2025 · For the first 150 million years after the Big Bang, there were no galaxies or stars or planets. The universe was just a soup of tiny, tiny things called particles.

Sep 25, 2025 · This happens when a star at least five times the mass of our sun goes out with a fantastic bang! Massive stars burn huge amounts of nuclear fuel at their cores, or centers.

Sep 25, 2025 · Credit: NASA What causes gravitational waves? The most powerful gravitational waves are created when objects move at very high speeds. Some examples of events that …

Sep 25, 2025 · Here are some fun facts about the James Webb Space Telescope: It is very, very big. The Webb telescope is as tall as a 3-story building and as long as a tennis court! It is so …

Sep 25, 2025 · Learning about the very first galaxies that formed after the big bang, like this one, helps us understand what the early universe was like. This picture shows hundreds of very old …

Sep 25, 2025 · It will allow scientists to look at what our universe was like about 200 million years after the Big Bang. This image of the Crab Nebula was created with information from the …

Sep 25, 2025 · The planet with living thingsOur home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more. …

Sep 25, 2025 · The biggest planet in our solar systemWhy does it look like the Moon is changing shape? From Earth, it might look like the Moon is changing shape each night – from a tiny …