Question

nebulae and galaxies are two types of celestial objects. most are so far away that they can be seen only with a telescope, but astronomers can gather enough information to tell them apart. a nebula is a cloud of interstellar dust particles and ionized gases, while a galaxy is a large collection of stars held together by gravity. one of the main differences between the two is their size. a galaxy is generally much larger than a nebula. in fact, a galaxy can contain a nebula, but a nebula cant contain a galaxy. when a large amount of mass builds inside a nebula, the gravitational attraction increases, and the nebula collapses to form a star. however, while galaxies contain stars, a galaxy as a whole will not collapse to form a star. in addition, galaxies are found in clusters or groups in space, but nebulae havent yet been observed in these patterns.

Explanation:

The text states that nebulae and galaxies are celestial objects. Galaxies are collections of stars held by gravity, while nebulae are clouds of dust and ionized gases. Nebulae can collapse to form stars (when mass builds up), but galaxies as a whole don't. Galaxies are found in clusters, nebulae aren't observed in such patterns.

Answer:

• Are celestial objects: Both (Galaxies - yes, Nebulae - yes)
• Are collections of stars: Galaxies (yes), Nebulae (no)
• Collapse to form stars: Nebulae (yes), Galaxies (no)
• Have been found in clusters: Galaxies (yes), Nebulae (no)