Astronomy Final
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- What is the minimum temperature required for fusion to occur?
- 10 million K
- A star is discovered that has exactly the same surface temperature as our Sun, but is considerably larger in size. Where would it appear on a typical HR diagram, compared to where the Sun is?
- Directly above the Sun
- What is the correct order for the spectral classes?
- OBAFGKM
- A 4 MSun stellar remnant would form a...
- Black Hole
- When it is done, our Sun will leave behind a..
- White Dwarf
- The diameter of a typical, middle-sized star is roughly how many times bigger than Earth's?
- 100 times
- What is a planetary nebula?
- The outer layers of a low mass star drifting off into space.
- What is the highest possible mass for a pulsar?
- 3 MSun
- What is the last element to build up in teh core of an M star (that is, the star of spectral class M)?
- Carbon
- The most massive black holes in the Universe are believed to exist in..
- Quasars
- According to Hubble's law, on large scales the ________ of a galaxy is proportional to its __________.
- redshift; distance
- What are the contents of the Universe during the particle era?
- Electrons, quarks, antiparticles
- During which era of the early Universe were hydrogen nuclei fusing into helium?
- Nucleosynthesis Era
- Which places in our solar system (other than Earth) are the most likely to have had life at some point?
- Mars and Europa
- True or False: When a star leaves the main sequence, its mass dramatically increases.
- False. Mass never increases, but rather is constantly decreasing.
- True or False: All main sequence stars have roughly the same mass.
- False.
- True or False: The Drake Equation gives an estimate of the number of life forms in the Universe.
- False. The Drake Equation gives us the number of technologically advances civilizations in our galaxy.