Astr 100 Study guides, Class notes & Summaries

1. The frequency of a wave is: (a) Measured in seconds (b) The distance between crests of the wave (c) The distance befiveen troughs of the wave (d) The number of peaks passing by any point per second (e) The same for all forms of electromagnetic radiation 2.Sunspots are observed as: (a) Dark spots in the Solar corona (b) Bright regions in the Solar corona (c) Dark spots on the Solar photosphere (d) Bright regions on the Solar photosphere (e) Places where no light is emitted by the S...

Which of the following distances is the greatest? - correct answer So called "Trojan" asteroids are distinguished because they, - correct answer Isotopes of the SAME element have the same number of, - correct answer In geology, what is the so called "ring of fire?" - correct answer Which of the following types of electromagnetic radiation has the longest wavelength? - correct answer According to Newton's universal law of gravitation, if the distance between two masses is...

What does is feel like to the astronauts as they orbit the earth? - correct answer like an elevator free falling as if the cable has broken What does "d" stand for in Newton's Law of Gravitation for a spacecraft orbiting a planet? - correct answer distance to the planets center Perihelion - correct answer the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun. Aphelion - correct answer which is the point in the orbit where the celestial body is farth...

The figure below shows an H-R diagram, with five stars labeled A through E. Which star has the highest temperature? - correct answer A If the sun was not currently in hydrostatic equilibrium, we would see? - correct answer the suns radius increasing and decreasing Which part of the sun is visible around the shadow of the moon? - correct answer chromosphere Stars that have spectral Type B _____ in temperature compared with stars that have spectral type M. - correct answer are hotter T...

On oct 14, NYC will see the sun eclipsed about ____ % _____ than Burlington - correct answer 6, more Because of the moons eccentric orbit, the maximum change in its apparent diameter is closest to ____ % - correct answer 10 The sun usually looks redder at sunset than at midday because ____ - correct answer you're looking through a longer path of atmosphere at sunset than at midday Annular solar eclipses cannot be seen - correct answer when the moon is near its perigee On average, th...

Milky Way Name of Galaxy that our solar system is located in, plus about 100 billion other stars Group A small collection of galaxies Cluster a large collection of galaxies Supercluster A collection of galaxy clusters Local Group Name of the group of galaxies that contains the Milky Way Sun Name of star that is located closest to Earth Expansion This is happening to the the average distance between galaxies, indicating that they were closer together in the pa...

Consider a spectroscopic binary star system in which the spectra of both stars are observed. If Star A is more massive than Star B, which star has the greater orbital velocity? a) Star A b) Star B c) They both have the same velocity d) The star that is closest to the center of mass e) It depends on where they are in their orbits - Consider a spectroscopic binary star system in which the spectra of both stars are observed. If Star A is more massive than Star B, which star has the greater o...

What are the Milky Way Galaxy's spiral arms? - The spiral arms are places where stars are formed from clouds of gas and dust Where are you in the Universe? If you had to give directions to your location in the Universe, what directions would you give? - We are the third planet away from the Sun. Our Solar System is located in one of the spiral arms of the Milky Way Galaxy, one within the Local Group of galaxies Why do astronomers now label Pluto a "dwarf planet"? - Due to its small size ...

ASTR 102 exam| Questions with 100% Solutions| A Rated Human technology seems on the verge of providing something on earth that the stars use all the time: thermonuclear reactions. This would give us a virtually inexhaustible supply of energy, but we face one particularly difficult problem namely: - we need to contain the hot hydrogen somehow. Since it has to be a temperature of several million degrees, ordinary material containers will not do it When we speak of the 'uniform' expansion o...