Astronomy 104: Exam 1 UPDATED Questions and CORRECT Answers
9 views 0 purchase
Course
Astronomy 104
Institution
Astronomy 104
Astronomy 104: Exam 1 UPDATED
Questions and CORRECT Answers
Solar System - Correct Answer- Sun, planets, astroids, and comets. 10^10 km= 60 AU
Milky Way Galaxy - Correct Answer- Great island of stars in space held together by gravity,
orbiting a common center. 10^18km= 100,000 ly
Local Group...
Astronomy 104: Exam 1 UPDATED
Questions and CORRECT Answers
Solar System - Correct Answer- Sun, planets, astroids, and comets. 10^10 km= 60 AU
Milky Way Galaxy - Correct Answer- Great island of stars in space held together by gravity,
orbiting a common center. 10^18km= 100,000 ly
Local Group - Correct Answer- Relatively small group of galaxies that surround the milky
way. 3x10^19=3 million ly.
Galaxy Clusters - Correct Answer- Groups of galaxies with more members.
Superclusters - Correct Answer- Clusters of galaxy clusters. 10^21km=100 million ly.
Astronomical Units AU - Correct Answer- Earth' average distance from the sun. 150 million
km= 6 trillion miles.
Lightyear ly - Correct Answer- Distance light can travel in one year. 10 trillion km = 6 trillion
miles.
Star - Correct Answer- Large, glowing ball of gas that generates heat and light through solar
fusion.
Planet - Correct Answer- Moderalty large object that orbits a sun and shines primarily by
reflecting light from its star. MUST 1) orbit a star; 2) be large enough for its own gravity to
make it round. 3) clear most other objects from orbital path. IF only two of these its a dwarf
planet.
Moon - Correct Answer- Object that orbits a planet.
Satellite - Correct Answer- Relatively small rocky object that orbits a sun.
, Asteroid - Correct Answer- Relatively small icy object that orbits a sun.
Small Solar System Body - Correct Answer- Asteroid, comet or other object that orbits a sun
but is too small to be a dwarf planet.
Star System - Correct Answer- A star or more and any planets that orbit it.
Observable Universe - Correct Answer- Portion of the entire universe that can be seen from
Earth, at least in principal.
Rotation - Correct Answer- Spinning of an object around its own axis. Fastest at equator and
slowest at poles
Orbit/Revolution - Correct Answer- Orbital movement of one object around another due to
gravity.
Expansion - Correct Answer- Most galaxies, expect the local group, are moving away from
us. Results of whole universe expanding not the individual motion of the galaxies. Ex: Raisin
Bread.
Life Cycle of a Star - Correct Answer- Gravity condenses material into a cloud. When dense
enough it begins to generate energy via nuclear fusion. Dies when material is exhausted.
Nuclear Fusion - Correct Answer- Lightweight atomic nuclei smash together and fuse to
make heavy nuclei.
Supernova - Correct Answer- Returned mixed matter in an explosion.
Cosmic Address - Correct Answer- Earth, Solar System, Orion-Cygnus Arm, Milkyway
Galaxy, Local Group, Virgo Supercluster, Universe.
Distances in Space - Correct Answer- Brightness cannot be used to estimate distance.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller MGRADES. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
