Astr 102 exam 2024 - Study guides, Class notes & Summaries

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 ...

Rank the following from earliest to latest: protostars, dark globule, star cluster, supernova - Dark globule, protostars, supernova, star cluster Which type of light will be most affected by interstellar extinction? - Ultraviolet Globular clusters formed _______________ the gas from which our galaxy formed had time to collapse into a disk. - before The first stage of stellar evolution is the ___________________ phase - protostellar Time moves slower the _____________ you're moving - faste...

ASTR 102 Midterm Exam Questions | 100% Correct Answers | Verified | Latest 2024 Version

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 different distances, but it is still convenient to think of the sky as a great starry sphere enclosing Earth. celestial sphere - the eastward rotation of Earth causes the Sun, Moon, planets, and stars to m...

ASTR 102 Midterm Exam Questions | 100% Correct Answers | Verified | Latest 2024 Version

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...

ASTR 102 Exam Questions With Answers 2024 New Update 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 Electric field and magnetic field oscillate in the same direction...

ASTR 102 Midterm Exam Questions | 100% Correct Answers | Verified | Latest 2024 Version 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...