Void (astronomy)

High school (ages 12+)
Space & Astronomy

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/void-astronomy

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the key characteristic?Extremely low galaxy density, typically hundreds of millions of light-years in diameter
2. What is a cosmic void?A cosmic void is a huge space in the universe that has very few galaxies. It is part of the big network of galaxy filaments and clusters called the cosmic web.
3. How do voids form?Matter in the universe pulls together into filaments and clusters. The places that get less matter become the empty voids we see.

Gravitational Instability Theory: The theory explaining how initial small density fluctuations in the early universe grew into large-scale structures.
Redshift Survey: An astronomical survey that measures the redshift of celestial objects to determine their distance and velocity.
Dark Energy: A hypothetical form of energy that permeates all of space and tends to accelerate the universe's expansion.