Artist's conception of a satellite
Click on image for full size
A satellite is any object that moves around another object. The Moon is a natural (not created by human beings) satellite of Earth.
Over the past fifty years, we have figured out how to make new Earth satellites. Since the 1957 Sputnik 1, thousands of satellites have been launched and many are still in orbit around Earth.
Satellites provide us with information about the universe that could not be obtained from ground-based observations. They also give us a perspective of our own planet. They are responsible for taking pictures of the Earth's weather that we see on the evening news, and they make it possible for us to watch events on T.V. that are happening on the other side of the world.
Shop Windows to the Universe Science Store!
Our online store
includes issues of NESTA's quarterly journal, The Earth Scientist
, full of classroom activities on different topics in Earth and space science, ranging from seismology
, rocks and minerals
, and Earth system science
You might also be interested in:
The Soviet Sputnik program consisted of four satellites, three of which reached Earth orbit. Sputnik 1, launched on Oct.4, 1957, became the first artificial satellite to successfully orbit the Earth. It...more
Scientists and students have designed a new satellite called Firefly. This satellite is the size of a loaf of bread and is designed to help solve the mystery of terrestrial gamma-ray flashes (TGFs). TGFs...more
In some years there are many hurricanes. Other years there are only a few. Each year, scientists make predictions about what they think the hurricane season will be like. They can’t say for sure how many...more
NASA launched a new satellite called the Far Ultraviolet Spectroscopic Explorer (FUSE). It will help scientists study the Big Bang by looking at light coming from objects far away. This will allow scientists...more
Look at this picture! The light blue parts are coral reefs just under the water’s surface. How many reefs do you see? The crew of the International Space Station (ISS) took this picture while looking...more
Scientists working on the MILAGRO project are using lots of special equipment that they set up on the ground near Mexico City. Here are some examples: Radiosondes: These balloons are similar to the ones...more
Icebergs are large pieces of ice that are floating in the ocean. They broke off of ice shelves or glaciers in Earth’s polar regions. Icebergs are a part of the cryosphere. Almost all of an iceberg is below...more