Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Astronomers may be getting closer to solving a long-standing mystery about the universe's largest galaxies.

From Science Daily • Jun. 19, 2026

Astronomers use the term heavy elements to describe all elements other than hydrogen and helium, which were produced shortly after the universe formed.

From Science Daily • Jun. 1, 2026

Astronomers describe an asteroid or comet as "active" when it releases dust, gas or larger pieces of material into space.

From Science Daily • May 14, 2026

Astronomers often look for signs of activity using telescopes.

From Science Daily • May 14, 2026

Astronomers have begun to measure the change in the universe’s expansion.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife