The Hubble Telescope
By: Riley Janz
An orbiting space telescope was first
imagined by astronomers in the 1940’s, but it took more than four decades before their dreams became reality. The Hubble Telescope, created by NASA and was the brainchild of Lyman Spitzer, is named after Edwin Hubble, the man who discovered the cosmos.
“The Hubble Space Telescope was designed to free astronomers of a limitation that has plagued them since the days of Galileo—Earth's atmosphere. Shifting air pockets in the atmosphere block and distort light, limiting the view from even the most powerful Earth-bound instruments.” -National Geographic. Orbiting space telescopes (like the Hubble), help us see further into the cosmos and our universe, more clearly, and provide us images of these amazing places.
Hubble was scheduled to launch In October in 1983, but the launch was canceled due to the loss of the spacecraft the Challenger. But later on April 24, 1990, aboard the spacecraft Discovery, the Hubble finally became operational and took pictures far better than telescopes on Earth, but there was a flaw in the design, and sent back slightly blurry images due to an optical problem with The Hubble’s main mirror. In December 1993, Astronauts aboard the Endeavor Performed five days of space walks repair the Hubble in orbit.
The repair worked, and from here on out, The Hubble Telescope took the clearest images of space ever taken, and is able to see further than any other telescope here on Earth. The Hubble Telescope is controlled from the Goddard Space Flight Center in Maryland.
Discoveries made by the Hubble
Images taken by the Hubble have helped determine how old our universe actually is. “The expansion rate of pulsating stars suggests is some 13 billion to 14 billion years.” -National Geographic. Also The Hubble Telescope has found some interesting, ancient galaxies in all stages of evolution. Seeing these images of ancient galaxies allows scientists to observe how galaxies are created and how they develop.
The Hubble Telescope played a massive role in the discovery of the peculiar Dark Energy (a.k.a. The Dark Side… Just kidding :) Little is known about this mysterious matter but scientist do know (thanks to the help of the Hubble,) that it is everywhere and it works against gravitational pull and helps to expand the universe.
The Hubble has also aided in the search for alien life. It measured the atmospheres and explored the compositions of other planets outside our own solar system. The data gathered in these searches can one day help in the search for E.T. Life.
Unfortunately, the Hubble Telescope is nearing retirement, it’s very last servicing was in May of 2009. While The Hubble Telescope is still in operation, NASA predicts it will last up to 2030-2040. But no need to fear, NASA has built other space telescopes that are even greater than Hubble, such as; the Kepler Space Telescope, and also the Spitzer Space Telescope and many more. Many people wish to bring Hubble back to Earth and put it into a museum.
How The Hubble Works
The Hubble Telescope orbits the Earth (to get around the problem of Earth's atmosphere), and is about as long as a school bus. The Hubble Telescope is not the type of telescope you can look through with your eye, Instead, inside the Hubble there is a mirror called the main mirror. This mirror is 8 ft. in diameter, when light comes through the opening in the front and hits this mirror, the light is reflected into the secondary mirror, which reflects the light through a hole in the main mirror into the Hubble's cameras and sensors.
The Hubble Telescope is solar powered and has 2 solar panels, meaning it uses energy from heat and the sun to power it. How the Hubble communicates with Earth is two high grade antennas mounted to it.
Build your own telescope!
And examine the Stars! Enjoy!
I hope you enjoyed my presentation!
Have a great day!
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Public - 4/5/16, 5:59 PM