AS101 Study Guide - Midterm Guide: Net Force, Northern Hemisphere, Declination
Document Summary
Everything we can possibly see is a tiny fraction. Why does it seem like there are so many objects in space. Massive ball of glowing gas that generates energy through nuclear fusion. Source of almost all energy on earth. Over 600 planets confirmed to be orbiting other stars. Thousands of candidate exoplanets, observed by the kepler space telescope. An object in orbit around a planet. Natural satellites are also known as moons . Asteroid: a small, rocky, object orbiting a star. Comet: a small, icy object that orbits the sun. A large system of stars, dark matter, gas, and dust, all bound together by their combined gravity. Raw materials for new stars from previous generations. Our sun probably formed in an open star cluster but has since moved out . A group of galaxies (a few dozen up to thousands) all held together gravitationally. Many clusters form a supercluster which make up the cosmic web.
