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Stars Test 3

QuestionAnswer
A high-mass star explodes as a supernova. The star's mass, before exploding, was 20 times the mass of the Sun, but 2 Solar masses of the star's core remains after the supernova and becomes a(n) . neutron star
A neutron star's strong gravity is caused mostly by its small size and . large mass
Globular clusters are found mainly . in the Galactic halo
In the Milky Way Galaxy, our Sun is located . about halfway out from the center
Astronomers classify different types of elliptical galaxies by . how flattened they are
We calculated in class that the escape speed from Earth is 11 km/s. What would be the escape speed from a planet the same size as Earth, but 4 times as massive as Earth? 22 km/s
A black hole with a mass of 4 Solar masses would have a Schwarzschild radius of . about 12 km
Consider a star in a circular orbit around a supermassive black hole at the center of a distant galaxy. If the distance from the central black hole to the star is 1,000 AU and the star orbits once every 10 years, what is the mass of the black hole? 10 million solar masses
Where in a galaxy would you find newly formed stars? in the disk of a spiral galaxy
A very large, perfectly spherical collection of stars would be classified as a galaxy. E0
What is Newton's modification to Kepler's 3rd law? P^2=a^3/M
By knowing the strength of an object's surface gravity, you can determine ... how much you would weigh if you could stand on the object. how fast the object can spin before breaking apart. the speed required to escape the object's gravity.
We know that a supermassive black hole must reside at the center of our Galaxy because ... stars near the center of the Milky Way are orbiting some unseen object.
Henrietta Leavitt's work on gave astronomers like Edwin Hubble a vital tool for measuring the distances to other galaxies. Cepheid variable stars
Why are black holes called black holes? They are called black holes because their gravity prevents any form of radiation or light from escaping them.
How can you measure the mass of a planet like Jupiter? By studying the orbits of Jupiter's moons.
Which statement best describes a pulsar? A pulsar is a neutron star, with an intense beam of radiation that flashes toward Earth each time the neutron star spins around.
Consider how the gravitation force depends on the distance between the objects. For example, tripling the distance (r) between two objects will cause the gravitational force between them to . become 9 times stronger
The Andromeda Galaxy is a nearby, large, spiral galaxy. The Andromeda galaxy was originally thought to be . much closer and smaller - a nebula in our own Galaxy.
Created by: AgniLive
 

 



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