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  2. Elliptical galaxies contain older stars and are often less active in terms of star formation and other processes compared to spiral galaxies. Elongation In astronomy, elongation refers to the angular separation between a celestial object (typically a planet) and the Sun as observed from Earth.

  3. Dec 30, 2020 · Here are the two basic relevant facts about elliptical orbits: 1. The time to go around an elliptical orbit once depends only on the length a of the semimajor axis, not on the length of the minor axis: \[ T^2 = \dfrac {4\pi^2 \alpha^3}{GM} \] 2.

  4. This glossary of astronomy terms contains definitions for some of the most common words used in astronomy, cosmology, astrophysics, and space exploration. You can click on any letter of the alphabet below to jump directly to that section in the glossary listing.

  5. Apr 13, 2024 · Elliptical galaxies form through galaxy mergers or the collapse of massive gas clouds, and come in a wide range of sizes and shapes. Notable elliptical galaxies include M87 and Centaurus A, which provide valuable insights into the formation and evolution of galaxies.

  6. May 9, 2022 · Elliptical galaxies have an even, ellipsoidal shape. They typically contain a much greater proportion of older stars than spiral galaxies do. Four classes are used to classify galaxies: spiral; barred spiral; elliptical and irregular.

  7. Jun 2, 2015 · tl;dr: "Elliptical" refers to a special kind of galaxies. "Elongated" is a loose term meaning that a galaxy is stretched out in one direction. Etymologically, "elliptical" means having a shape that can be described by a certain mathematical function — the ellipse.

  8. Nov 21, 2023 · The Law of Ellipses. Lesson Summary. Frequently Asked Questions. What do ellipses have to do with Kepler's first law? Kepler's First Law states that any planet's orbit must be in...

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