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Meteors are commonly called falling stars or shooting stars. If any part of the meteoroid survives burning up and actually hits the Earth, that remaining bit is then called a meteorite. At certain times of year, you are likely to see a great number of meteors in the night sky.

Most meteors glow for only a few seconds prior to burning up before hitting the Earth's surface. On most dark nights, meteors can be seen. The chance of seeing a meteor with the unaided eye increases after midnight. People often refer to meteors as "falling" or "shooting" stars. The brightest of the meteors are called fireballs.

If you have ever seen a "falling star", you were actually seeing a meteor. Most of the original object burns up before it strikes the surface of the Earth. Any leftover part that does strike the Earth is called a meteorite. A meteorite can make a hole, or crater, in the ground when it hits it. The larger the meteorite, the bigger the hole.

This photograph shows one of the meteorites which survived the "Chicago Fireball".

However, calculations showed that a star powered on chemical energy would only last maybe a thousand years or so. In the mid-1800s two physicists, Lord Kelvin and Hermann von Helmholtz, put forward the idea that the huge weight of the Sun's outer layers should cause the Sun to gradually contract.

Star watching has occupied humans from the earliest times. Our ancestors studied the night sky and saw shapes and patterns among the stars. They often made up stories to explain what they saw. The same star constellation was seen very differently by people from different countries, or even different parts of the same country.

To our eyes, this makes the star seem to twinkle. You will notice that stars closer to the horizon will appear to twinkle more than other stars. This is because there is a lot more atmosphere between you and a star near the horizon than between you and a star higher in the sky. Go out some night soon and have a look!

Passing by the comet at a velocity of 68 km/second, the spacecraft suffered some damage. Some of the instruments no longer worked or were only partially functional. The star mapper's baffle was peppered with holes. Subsequent analysis of Giotto's data showed that water accounted for about 80% of all of the material being thrown out by the comet.

Events such as star birth and star death emit photons that occur across the entire electromagnetic spectrum. Within the past 30 years, astronomers have developed the ability to view the universe in radio waves, gamma-rays, and all energies in between. This ability has allowed us to discover amazing events in our universe such as GRBs.

May 14, 2018 · StarChild is a learning center for young astronomers ages 5-13 to learn about the solar system, the Milky Way galaxy, and the universe beyond.