ASTR 102 EXAMS BUNDLE all with With Questions & 100% Solutions|

What is a falling star? - Debris from a comet or asteroid that has fallen and is evaporating. What is the farthest object in our Solar System? - The Oort Cloud Describe the Oort Cloud - 1. Made up of Comets - icy dirty glaciers 2. Comets: the melted debris that is trailing behind us because it is...

What is meant by spectral resolution? A) It is a measure of how much energy an object emits in different parts of the electromagnetic spectrum. B) It is a measure of how close two spectral lines can be distinguished. C) It is a measure of how close two point sources can be distinguished. D) It ...

B) They will hit the ground at the same time. - Suppose you drop a feather and a hammer on the Moon from the same height at the same time. What will happen? Aj The feather will hit the ground first. B) They will hit the ground at the same time. C) The hammer will hit the ground first. D) They w...

What 2 observations tell us the universe is expanding? - Galaxies are moving away from us and their speeds are proportional to distance How does an objects red or blueshift relate to the object's movement? - Blueshift is when an object is moving towards you. Redshift is when an object moves away...

How much time is there between when a star rises and when it sets? - it depends on the star You go out tonight and see the brightest star in the constellation Orion just rising above your eastern horizon at 10 PM. One week later at 10 PM this same star will be - slightly higher in the sky. One ni...

The celestial sphere - An imaginary sphere surrounding Earth to which the stars are attached. Ancient astronomers believed the sky was a great sphere surrounding Earth with the stars stuck on the inside like thumbtacks. Modern astronomers know that the stars are scattered through space at differe...

he 'size' of a black hole is given by the Schwarzchild radius. For the earth this is about 1 cm. This means that: - if the earth were somehow to be shrunk to this size, gravity would win and there would be an inevitable collapse to a 'singularity' at the center In addition to supernovae forme...