Science 1095

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School

Lone Star College System, North Harris *

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Course

2203200

Subject

Astronomy

Date

Oct 30, 2023

Type

pdf

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Uploaded by JusticeEelPerson973

Science 1095 Study online at https://quizlet.com/_6g8x7i 1. light-year A _______________________________________ is the distance light travels in one year. 2. parallax Astronomers have discovered a means of mea- suring the distances to nearby stars by using ___________________________________. 3. parsec Astronomers sometimes use the ______________________________________, which is equal to 3.26 light-years, as a unit of measurement to measure the immense distances in space. 4. Alpha Centauri The nearest star system to our solar system is _______________________________________. 5. spectrum analysis Astronomers are able to determine the sur- face temperature of a star by its color and its _____________________________________. 6. yellow According to color, the order of the least hot starts to the hottest stars is red, ___________________________, blue-white. 7. Orion The constellation _____________________________________ contains the red supergiant known as Betelgeuse. 8. Apparent ____________________________________ magnitude is the degree of brightness of an object as it is seen from Earth. 9. Hipparchus ____________________________________ de- vised a system to classify the stars he could see in the nighttime sky, and he labeled the brightest star a first-magnitude star. 10. Hubble 1 / 5

Science 1095 Study online at https://quizlet.com/_6g8x7i The _______________________________ Space Telescope has enabled astronomers to see stars of the thirtieth magnitude. 11. distance A star's size, energy output, and ______________________________ from Earth affect its apparent magnitude; therefore, the ap- parent magnitude may not indicate a star's true brightness. 12. Absolute _____________________________ magnitude compares the brightness, or magnitude, stars would have if they were all the same distance, ten parsecs, from Earth. 13. Red dwarfs ____________________________ make up about two-thirds of all the stars in our galaxy. 14. giants Stars that are 20 times larger than Sol, Earth's sun, are considered to be ____________________________. 15. location Today astronomers divide the sky into a grid using degrees, hours, minutes, and seconds to pinpoint the exact _________________________________________ of a particular star. 16. Earth's Most of the apparent motion of heavenly bodies is due to _____________________________ rota- tion and not to the actual movement of the moon or stars. 17. binary A ____________________________ star is a system of two stars in which one star revolves around the other or both stars revolve around a common center of gravity. 18. multiple 2 / 5

Science 1095 Study online at https://quizlet.com/_6g8x7i A _________________________________ star is a system of three or more stars revolving around a common center of gravity. 19. ten A cluster is a multiple-star group containing ____________________________ or more stars. 20. nova When excess energy builds up inside a dwarf star and it explodes and hurls huge amounts of gas, dust, and energy into space, a ____________________________ is formed. 21. supernova If a giant or a supergiant star becomes unsta- ble, it could cause a tremendous explosion called a ________________________________, which may outshine a galaxy for a short time. 22. neutron When a supernova dims, the gravity may condense the matter into a small- er, denser star, perhaps a white dwarf, a _______________________________ star, or even a black hole. 23. pulsar A neutron star that emits a radio signal that appears to start and stop in a rhythmic pat- tern as the star rapidly spins is called a ____________________________. 24. black hole In theory a supernova could produce a neutron star so dense its gravitational field would not per- mit any energy to be emitted; such a star is called a ___________________________. 25. lens A refracting telescope uses a ____________________________ to gather light from distant objects. 26. mirror Reflecting telescopes use a dish-shaped, or con- cave, ____________________________ to gath- er light from objects. 3 / 5

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Science 1095 Study online at https://quizlet.com/_6g8x7i 27. dish A radio telescope consists of a concave ____________________________ that collects radio waves from space and focuses them onto a receiver, which changes the radio waves into electrical signals. 28. Sagittarius Our solar system is located in the Orion Spur of the ____________________________ Arm of the Milky Way Galaxy. 29. disk Many astronomers believe the Milky Way is a barred spiral galaxy, and when viewed from the side, the galactic bulge and the ____________________________ are the two main parts. 30. bulge Most of the matter of the galaxy is concentrated in the galactic ____________________________. 31. elliptical A/An ____________________________ galaxy is circular or elongated and has no spiral pattern. 32. S0 A/An ____________________________ galaxy has a spiral disk but no discernible arms. 33. barred spiral A galaxy with an elongated central bulge and spiral arms extending from the ends of the bar is a _________________________________ galaxy. 34. irregular An _______________________ galaxy is ran- domly shaped with no discernible appearance. 35. Milky Way The Andromeda, the ____________________________, and the Tri- angulum galaxies are the three largest members of the Local Group. 36. Virgo The _____________________________ Cluster, to which the members of the Local Group belong, 4 / 5

Science 1095 Study online at https://quizlet.com/_6g8x7i is an example of a rich cluster because it contains more than 1,000 galaxies. 37. Quasars ________________________________ are bright, radio-emitting objects that appear to be larger than any star but smaller than a galaxy. 38. stars The ________________________________ have served as a map, helping sailors and travel- ers navigate from one location to another. 39. glory One of the main purposes God set the stars in the heavens was to declare the ____________________________ of God. 40. Therefore we ought to give the more earnest heed to the things which we have heard, lest at any time we should let them slip. Hebrews 2:1 Scripture ___________________________________________ ___________________________________________ ______________________________________ ____________________________________ 5 / 5