Dsst astronomy - Study guides, Class notes & Summaries

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DSST Astronomy - Deck 1 questions and answers rated A+ 2025/2026

terrestrial planet (rocky planet) a planet with a solid surface, that is mainly composed of rock and solid materials gaseous planet (gas giants) a planet that has little to no solid surface and is mostly composed of gases dwarf planet a planet that is too small to be considered a full planet light-year the distance that light travels in one year, roughly 6 trillion miles or 63,000 AU parsec a unit of measurement in astronomy, equals to about 206,000 AU or 3.2 light-years magnitude...

Parallax An apparent shift in a star's position relative to the stars around it. This perceived shift is caused by motion on Earth's surface as it rotates around the sun. Scientific Method An ordered process for discovering new knowledge that relies on observation, explanation, prediction, and experimentation. Occam's Razor A problem-solving principle that says the simplest solution to a problem is most likely to be correct. Theory A testable prediction based on real-world observatio...

Astronomy the study of everything in the universe, from all the celestial bodies to space itself; greek for "law of the stars" (astron = star; nomos = law) Sun the star at the center of the Solar System, 27 million degrees at core, 99.8 % of mass in SS Nuclear Fusion Hydrogen atoms fuse together to make Helium (happens in core of Sun) Solar System the gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly Mercury the smallest an...

ASTRONOMY DSST TEST REVIEW

Astronomy DSST Test Review questions and answers rated A+ 2025/2026