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Planets orbit the Sun at different distances.
Planets orbit the Sun at different distances.

... in the western sky in the early evening, you have probably seen the planet Venus. Even if you live in a city, you may have seen Mars, Jupiter, or Saturn but thought that you were seeing a star. Mercury is much more difficult to see. You need a telescope to see the large but distant planets Uranus an ...
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... Stars with a mass ten times the Sun • The supernova explosion blasts matter into space and shines for about a month. • The remains of the star form a neutron star having a mass three times the Sun but with a diameter of only 20 kilometres! • A teaspoon of matter from a neutron star would have a ma ...
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... What causes the occurrence of seasons on the Earth? What causes the phases of the moon? What are the angles of the earth, moon and the sun At full moon, new moon, a quarter moon. What is precession of the earth’s axis and how long it takes to complete one cycle. What are the consequences of this pre ...
October 2011
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... time. It is a Wolf-Rayet star and has the most distinctly red nebula around it that I have ever seen through an eyepiece. The color is due more to Nitrogen in the nebula than Hydrogen. Interestingly, in 1893 it was initially reported as a planetary nebula, thus the PK 64+5.1 designation. It is still ...
No. 52 - Institute for Astronomy
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Zoink Questions: Tools of Astronomy
Zoink Questions: Tools of Astronomy

... 47. Which type of electromagnetic wave has the longest wavelength and lowest frequency? 48. Which electromagnetic waves have wavelengths longer than those of visible light? Give an example of how each kind of wave is used. 49. What are the differences between reflecting telescopes and refracting tel ...
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... • The solar system includes the sun, Earth, the other planets, and many smaller objects such as asteroids and comets. • The solar system is part of a galaxy. • galaxy a collection of stars, dust, and gas bound together by gravity • The galaxy in which the solar system resides is called the Milky Way ...
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... • A region of the solar system that starts just beyond the orbit of Neptune and that contains dwarf planets and other small bodies made mostly of ice • Looks like a doughnut-shaped ring just beyond the orbit of Neptune • Short period comets originate in the Kuiper Belt • There may be hundreds of tho ...
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... Answer the question and present to class = 10 pts. Each CH 2. 1. All cultures on Earth named constellations. Why do you think this was such a common practice? (Give examples) CH 5. 4. What observations would you make if you were ordered to set up a system that could warn astronauts in orbit of dange ...
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Deep Infrared Images of Star-Forming - University of Missouri

... Objects in the sky emit several forms of radiation, including infrared and visible light. Visible light was the main source of astronomical research until the mid 1940’s. Astronomers could use telescopes to collect light from objects in space. Objects with temperatures between 3,000 and 10,000 K emi ...
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... to be as smooth as other wave detection mirrors since radio wavelengths are longer. However, since the wavelength is longer, the resolution generally is not as good as optical telescopes. The largest steerable single-dish radio telescope is the 100 meter Green Bank Telescope in West Virginia. The la ...
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... • Detects radio waves given off by objects in space • Most have curved reflecting surfaces that are several hundred meters in diameter • The bigger the radio telescope, the more radio waves it can collect ...
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Spitzer Space Telescope



The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003. It is the fourth and final of the NASA Great Observatories program.The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009. Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments are no longer usable. However, the two shortest-wavelength modules of the IRAC camera are still operable with the same sensitivity as before the cryogen was exhausted, and will continue to be used in the Spitzer Warm Mission. All Spitzer data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA).In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named after famous deceased astronomers by a board of scientists, the new name for SIRTF was obtained from a contest open to the general public.The contest led to the telescope being named in honor of astronomer Lyman Spitzer, who had promoted the concept of space telescopes in the 1940s. Spitzer wrote a 1946 report for RAND Corporation describing the advantages of an extraterrestrial observatory and how it could be realized with available or upcoming technology. He has been cited for his pioneering contributions to rocketry and astronomy, as well as ""his vision and leadership in articulating the advantages and benefits to be realized from the Space Telescope Program.""The US$800 million Spitzer was launched from Cape Canaveral Air Force Station, on a Delta II 7920H ELV rocket, Monday, 25 August 2003 at 13:35:39 UTC-5 (EDT).It follows a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical unit per year (a so-called ""earth-trailing"" orbit). The primary mirror is 85 centimeters (33 in) in diameter, f/12, made of beryllium and is cooled to 5.5 K (−449.77 °F). The satellite contains three instruments that allow it to perform astronomical imaging and photometry from 3 to 180 micrometers, spectroscopy from 5 to 40 micrometers, and spectrophotometry from 5 to 100 micrometers.
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