... mirror, secondary mirror, and the three fine guidance sensors was awarded to Perkins-Elmer. The HST project was designed and built to serve a different purpose for NASA and the European Space Agency (ESA) than the two previous satellites. In their effort to benefit from the international astronomical researches and studies, the scientists decided to operate the HST as a long-lived and ... permanent space-based unit. In order to carry out the missions and protect the spacecraft against instrument and equipment failures, NASA set up regular servicing missions. It might seem a little bit od...

• Word Count: 3931
• Approx Pages: 16

... spacecraft visit by The Mariner 4 in 1965 (Arnett). Scientists believe that information recorded from Mars is necessary in order to study Earth's processes, especially the weather system. The study of space weather and weather on other planets provides scientists with information that provides a greater knowledge of how our planet works. Jonathan Lunine, a professor at University of Arizona, believes that studying the ... released by the Sun when the strong magnetic fields in the outer solar atmosphere are closed. This causes the release of bubbles of gas and magnetic fields that explod...

• Word Count: 4020
• Approx Pages: 16
• Has Bibliography
• Grade Level: High School

... the time needed to determine the redshift of many galaxies from perhaps 8 h to about 1 min. This factor of 500 has led to a qualitative change, whereby the mapping of space becomes possible to a new degree of completeness. Astronomers also use a piece of equipment called the star tracker. This is a device that automatically measures the angular separation of stellar observations ... that precise, autonomous (free from any radio position aids), terrestrial navigation can be achieved. Star trackers are also used extensively for both military and non-military applications on space probes, s...

• Word Count: 5465
• Approx Pages: 22
• Has Bibliography
• Grade Level: High School

... Our Solar System From the beginning of time man has looked to the skies from intrigue and for answers and explanations. Many objects in space have observed, such as stars, constellations, galaxies, plants and moons. These celestial objects have been looked upon as spiritual and even as ... our world. Today, objects have been looked upon as spiritual and even as if they are the gods of our world. Today, objects in space are being studied and understood more than ever before. No longer are they looked upon as the gods or answers, but they still carry much ... . Saturn's interior is also s...

• Word Count: 2531
• Approx Pages: 10
• Has Bibliography
• Grade Level: High School

... to identify. Their brightness rises quickly to its highest possible point then fades away slowly over a period of a few days. Spectroscopy has given information about the movement of stars in space. In 1842 Christian Doppler hypothesized that the velocity of a star would affect the color of starlight. He believed that the wavelength of the light of a star that is moving away ... constantly changing air. The light gives off the twinkling effect and stars are viewed as spheres rather than a pinpoint of light. Planets don't twinkle because they reflect light back into space, not into the E...

• Word Count: 3183
• Approx Pages: 13
• Grade Level: High School

... earth's atmosphere so that it lets in more harmful radiation from the sun. At the same time, our polluted atmosphere is becoming a better insulator, preventing heat from escaping back into space and leading to a rise in global average temperatures. Scientists predict that the temperature increase, referred to as global warming, will affect world food supply, alter sea level, make weather more ... earth's atmosphere so that it lets in more harmful radiation from the sun. At the same time, our polluted atmosphere is becoming a better insulator, preventing heat from escaping back into spac...

• Word Count: 6167
• Approx Pages: 25
• Has Bibliography
• Grade Level: Undergraduate

... hour at the equator, and moving around the Sun at 70,000 miles per hour (approximately 19 miles per second), while the Sun and its solar system are moving through space at 600,000 miles per hour in an orbit so large it would take over 220 million years just to complete a single orbit. Interestingly, however, as the Earth moves in ... ...

• Word Count: 2632
• Approx Pages: 11
• Grade Level: High School

... must be transported is sometimes larger than either radiation of photons or convection can account for. In these cases, significant amounts of energy may be transported from the center to space by the radiation of neutrinos. This is the dominant method of cooling or stars in advanced burning stages, and also plays a central role in events like supernovae associated with the ... ...

• Word Count: 2570
• Approx Pages: 10
• Has Bibliography
• Grade Level: High School