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Star Systems and Galaxies

Choose the word from the drop-down menu that completes each sentence.
A) An binary star system is made of two stars.
B) An open star system is made of no more than a few thousand stars.
C) An elliptical star system is made of more than a million stars.

1 Answer

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Final answer:

The correct terms to complete the sentences are binary for two stars in a system, open for star clusters with up to a few thousand stars, and elliptical for massive galaxy systems with over a million stars.

Thus, the correct option is A.

Step-by-step explanation:

The correct words to complete the sentences with respect to star systems and galaxies are as follows:

  • A) A binary star system is made of two stars.
  • B) An open star system is made of no more than a few thousand stars.
  • C) An elliptical galaxy is made up of more than a million stars.

Binary star systems, like our own solar system's nearest neighbor, Alpha Centauri, consist of two stars that orbit a common center of mass. Open star clusters, such as the Pleiades, contain a relatively small number of stars bound by mutual gravitational attraction. Lastly, elliptical galaxies are large collections of stars that can contain up to trillions of stars and lack a well-defined structure.

Therefore, the correct option is A) An binary star system is made of two stars.

User Seereddi Sekhar
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