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The Hubble Telescope. By Sara Williams. How It Works.
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The Hubble Telescope By Sara Williams
How It Works Every 97 minutes, Hubble completes a spin around Earth.As it travels, Hubble's mirror captures light and directs it into its several science instruments. The Hubble is a type of telescope known as a Cassegrain reflector. Light hits the telescope‘s primary mirror. It bounces off the primary mirror and hits a secondary mirror. The secondary mirror focuses the light through a hole in the center of the primary mirror that leads to the telescope's science instruments. Telescopes actually work by collecting more light than the human eye can capture. Hubble's primary mirror is 94.5 inches in diameter. Once the mirror captures the light, Hubble's science instruments work together or individually to provide the observation. Each instrument is designed to examine the universe in a different way.
Fun Facts • NASA named The Hubble Telescope after American astronomer Edwin P. Hubble. Dr. Hubble confirmed an "expanding" universe, which provided the foundation for the Big Bang theory. • Launch: April 24, 1990 from space shuttle Discovery • Deployment: April 25, 1990 • Mission Duration: Up to 20 years (The Hubble is still snapping photos of space today) • Length: 43.5 ft • Weight: 24,500 lb • The Hubble Telescope can’t observe the Sun or Mercury because Mercury is too close to the Sun. • Energy Source: The Sun ( 25-foot solar panels)
The next slides contain real pictures that were taken from the Hubble Telescope
The Butterfly Nebula What resemble delicate butterfly wings are actually cauldrons of gas that are more than 36,000 degrees Fahrenheit. The gas is traveling across space at more than 600,000 miles an hour. That is fast enough to travel from Earth to the Moon in 24 minutes. A dying star is at the center of this amazing nebula.
The Sombrero Galaxy The galaxy is 50,000 light-years across and 28 million light years from Earth .The glowing bulge holds a population of stars largely different from those in the flat disk. Look close to see numerous slightly fuzzy stars, each of which is itself composed of many hundreds of thousands of stars.
Stellar Spire in the Eagle Nebula Appearing like a winged fairy-tale creature, this object is actually a spiraling tower of cold gas and dust rising from a stellar nursery called the Eagle Nebula. This tower is about 57 trillion miles high, about twice the distance from our Sun to the next nearest star. The tower is a giant incubator for newborn stars
Pismis 24 The small open star cluster Pismis 24 contains extremely massive stars. The brightest object in the picture was once thought to weigh as much as 200 to 300 solar masses. ( 200 to 300 solar mass is 200 to 300 times the mass of the sun.) This would have made it by far the most massive known star in the galaxy, and put it considerably above the currently believed “ biggest star” that weighs only 150 solar masses.However, Hubble images show that it is really two stars, each 100 solar masses, orbiting one another.