An unidentified flying object, or UFO, is an object observed in the sky that is not easily identifiable. Most UFOs are later identified as conventional objects like weather balloons or airplanes but some things in the night sky remain a mystery. The term UFO was coined in 1953 by the United States Air Force as a catchall for unidentifiable phenomena in the sky.

Telescopes work by using two lenses to focus the light and make it look white and object is closer to you than it really is.Refracting telescopes use lenses to focus the light.Reflecting telescope use lenses to focus the light.both lenses are in a shape that is called a convex. Telescopes are generally used to look into space and see stars.

Stars are huge balls of hydrogen and helium that are formed in galaxies from great big clouds of gas and dust over billions and billions of years. All Stars are suns, just like our sun. Stars are just like people, they have a lifecycle and eventually will die out. Stars begin as cloud clusters of dust and gas. As more dust and gas stick together gravity pulls them together and hold them like glue. Stars twinkle in the in the night sky because of the Earth's atmosphere. The core of the star is extremely hot and produces energy. Some of this energy is released as visible light which makes the star glow.

Planets in our solar system circle around the sun. There are eight planets in our solar system. Smaller planets with solid ground include Mercury, Venus, Earth and Mars. There are four larger gas giants including Jupiter, Saturn, Uranus and Neptune. We are learning new things about our neighboring planets all the time. We send astronauts to space to take pictures, gather information and find out more about them. Their are eight planets inside of our own solar system and thousands of planets outside of our solar system.

  UFO Space Games

Telescopes from the Ground Up

Make your own hand held Hubble

Solve a Telescope Crossword

The Galileo Project

Constellations

Our Solar System

Stars & Galaxies

Sky Watch with Hubble Watch

Hubble Deep Field Academy

Star Astronomy Building Game

Cool Cosmos - The Sun

Earth, Moon and Sun - An Interactive Learning Experience

About the Sun (shockwave, flash, videos)

Make Your Own Galaxy Star Game

The Original Asteroids Game

Explore our solar system game

Nyan Lost in Space Game

Silly Asteroids Flash Game

Black Holes Space Exploration Game

Command the Space Shuttle Game

Solar System Switcheroo Game

Save the Astronauts Game

Galaxy Explorer Game

NASA Presents Spacewalking Game

Satellite Insight Space Game

Stars and galaxies

Astronomy Games

Astronomy and Astronomers

Our Solar System

Planets in Our Solar System

Space Travel Games

Science Games