Astr 102 exam Study guides, Class notes & Summaries

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 is the same as angular resolution when applied to telescopes operating at different wavelengths. - B) It is a measure of how close two spectral lines can be distinguished.

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 will float in space because of the lack of gravity on the Moon.

order of red giant's life - Red Giant → Planetary Nebula → White Dwarf → Black Dwarf or Red Giant → Type II Supernova → Neutron Star or Red Giant → Type II Supernova → Black Hol The eventual fate of our Sun is to - become a steadily cooling white dwarf.

Quiz Not good place to build Observatory? - Australia (because of fire disaster) Best Location for an Observatory - 1. Big Island of Hawaii 2. Andes Mtn Chile 3. San Diego Dots - Stars in our galaxies blobs - Typically galaxies, 10% could be dead stars Light - Acts as 1. Weight 2. A Particle

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 formed from the collapse of massive stars as they run out of fuel, supernovae of another kind are produced when: - a white dwarf near the 'Chandrasekhar limit' has extra matter dumped onto it from a co...

The apparent motion of a foreground object relative to a distant background as the observers position changes? - Parallax When measuring parallax the distance between two observation points is called? - Baseline If Earth rotated twice as fast as it currently does, but its motion around the Sun stayed the same, then? A. The night would be twice as long B. The night would be half as long C. The year would be half as long D. The length of the day would be unchanged. - B. A long, thin cloud ...

When the sun becomes a red giant its luminosity will be _____________ times what it is now - 2000 When a star first moves off the HR diagram, its radius _________________ and its surface temperature ____________________ - increases, decreases If a white dwarf is able to gain enough mass to exceed ____ solar masses, its self-gravity will be stronger than electron degeneracy pressure, and the star will collapse. As it does so, its temperature increases to the point that ______________ can un...

What is wavelength? - Answer Distance between two crests What is amplitude? - Answer Distance between crest and resting position What is period? - Answer Time between one crest and the next one What is the frequency of a wave? - Answer Number of oscillations that pass by per second (1/Period) How do you calculate wave speed? - Answer wavelength x frequency

Expression - Answer Artistic movement that aspired to represent inner experience, explore the worlds of psyche, and to render visible the stressful emotional life of the modern person—isolated -represents the tormented feelings of people stuck in world of pain + conflict Second Viennese School: - Answer Arnold Schoenberg, Anton Webern, and Alban Berg. Arnold Webern - Answer Best know for his atonal and twelve tone pieces, such as Pierrot Lunaire. - Legacy of innovation Early American m...