Astr 121 Study guides, Class notes & Summaries

A gas cloud collapses because of - ️️self-gravity A low pressure region in Jupiter's southern hemisphere moves - ️️counter-clockwise A problem for the encounter hypothesis is - ️️hot gas expands stars move too fast A virus is - ️️non-living in isolation Are moon for TNO's common? - ️️yes Based on its shape, which moon formed from a molten object? - ️️Titan Ceres, the first asteroid to be discovered, lies between Mars and Jupiter. Why was Ceresunknown to ancient a...

3 key processes from solar nebula to spinning disk - ️️1. heating 2. spinning 3. flattening 4 categories of materials in the solar nebula - ️️1. hydrogen and helium 98% 2. hydrogen compounds 1.4% 3. rock 0.4% 4 metals .2% 4 Major clues that show how solar system was formed - ️️1. Patterns of motion among large bodies 2. Two major types of planets 3. asteroids and comets 4. Exceptions to the rules 4 major geological processes - ️️1. Impact cratering 2. Volcanism 3. Tectonics 4....

absolute magnitude - ️️The actual brightness of a star absorption line spectrum - ️️A cloud of gas between us and a light bulb can absorb light of specific wavelengths, leaving dark absorption lines in the spectrum apparent magnitude - ️️the brightness of a star as seen from Earth arcminute - ️️1/60 of a degree arcsecond - ️️1/3600 of a degree blue shift - ️️the displacement of the spectrum to shorter wavelengths in the light coming from distant celestial o...

A college friend of yours who has been postponing taking any science courses hears you talking about the generation of nuclear energy in the Sun and makes the following observation: "The whole idea of the atomic nucleus is pretty ridiculous. If an oxygen nucleus consists of eight protons and eight neutrons, the charge on that nucleus is positive. Since even I learned in high school that like charges repel, such a nucleus would find all its positive protons repelling and quickly fall apart." Ho...

ASTR Ch5_6 Correctly Answered Questions 2024. According to Aristotle, which of the following would be an example of violent motion? - CORRECT ANSWER a person pushing a car along the street Galileo found that - CORRECT ANSWER heavy and light objects fall at the same rate. Newton concluded that some force had to act on the moon because - CORRECT ANSWER a force is needed to pull the moon away from straight-line motion. The radius of Earth is 6378 km. The force of gravity on a 1 kg bal...