Astronomers Study guides, Class notes & Summaries

 -1.5 magnitude Sirius appears 25x brighter than 2 magnitude Polaris.  “All neutron stars are pulsars, but not all pulsars are neutron stars” FALSE  “Spectroscopic Binary” is the term given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts.  A 6.8 solar mass neutron star does NOT exist.  A loop of gas and charged particles following the magnetic field lines between sunspot’s poles is a Prominence/...

1. What is the single most important reason that astronomers have learned more about our planetary system in the last 30 years than all of history before then. a. astronomers today are a lot smarter than astronomers were earlier b. the Hubble Space Telescope c. we have been able to send spacecraft to visit many planets and satellites d. radio telescope arrays allow astronomers to make out details on the planets that they have never been able to see before e. the planets (moving in their s...

GACE Middle Grades Science Latest Update with Verified Answers tidal hypothesis Theory that the solar system started with a near collision of sun and large star. Few astronomers believe this theory. condensation hypothesis solar system began with rotating clouds of dust and gas. Condensation happened in center to form sun, and smaller parts of clouds formed. More astronomers believe in this idea. Core Outer core- liquid; inner core- solid. Very dense in center. Believed that core is...

Even though it is not realistic, why is the celestial sphere model useful? Correct Answer-Describes the locations of things "on" the sky. Declination is measured from the _________ to the __________ Correct Answer-celestial equator; celestial poles How do you measure right ascension? Correct Answer-Measured from "First point in Aries" around the celestial equator Latitude is to declination as longitude is to __________ Correct Answer-Right Ascension Why are the zodiacal constella...

Constellations Correct Answer-Recognizable patterns of stars in the sky (big dipper, orions belt) Makes locating stars easier. The official borders were set in 1928 by the International Astronomical Union (IAU). How many constellations are there? Correct Answer-88 Celestial sphere Correct Answer-our view of the night sky; an artificial sky map created by astronomers that applied a coordinate system to it, analogous to the coordinate system of north-south latitude and east-west longitude ...

How long does it take the Earth to orbit the Sun? Correct Answer-one year What is the name given to the path of the Sun as seen from Earth? Correct Answer-Ecliptic The ecliptic is best described as a(n): Correct Answer-plane How many months apart are Winter Solstice and the Vernal Equinox? Correct Answer-3 months Over what place on Earth is the Sun directly overhead on the Autumnal equinox? Correct Answer-the equator When you are facing Polaris you are... Correct Answer-...facing ...

Gravity is an ________ force between two objects with mass, acting along the line between them. - correct answer attractive How many stars are in the Milky Way galaxy? - correct answer 200 billion Newton's first law of motion says that an object at constant velocity will remain at constant velocity unless acted upon by a - correct answer force In his General Theory of Relativity, Einstein revised our understanding of - correct answer gravity Early astronomers believed the earth was ...

As astronomers have learned more about the structure of the Sun, they found that it - Answer- is made entirely of hot gas. You are out on the beach, enjoying the warm sunshine with friends. As you glance (briefly we hope) up at the Sun, the part of the Sun that you can see directly is called its - Answer- photosphere. How do astronomers know the composition of the outer layers of the Sun? - Answer- We take an absorption line spectrum of the Sun. these absorption lines tell us what ...

PHSC 102 Exam Questions with Correct Answers How long does the sunspot cycle last, on average? Select one: a. about seven years b. about 76 years c. about 11 years d. between 25 and 35 days - Answer-11 years The vibrations of the Sun reveal information about Select one: a. the magnetic field of the Sun. b. the production of energy in the Sun. c. the structure of the atmosphere of the Sun. d. the interior structure of the Sun. - Answer-interior structure The most abund...

ABCTE -The Solar System and the UniverseTools of the Astronomer - correct answer The basic tool that astronomers use to study celestial objects is the telescope. People tend to be most familiar with optical telescopes, but astronomers use telescopes that span the entire electromagnetic spectrum. Radio Waves - correct answer Radio waves are the longest waves of the electromagnetic spectrum. We use radio waves to broadcast radio, TV, and cellular phone signals. Radio waves are also used to pe...