Q. With reference to dark energy and dark matter, consider the following statements:
1. Majority of the universe is dark matter.
2. Dark matter attracts and holds galaxies together.
Which of the statements given above is/are correct?
Answer: B
Notes:
- Statement 1 is incorrect: Roughly 68% of the universe is dark energy. Dark matter makes up about 27%. The rest – everything on Earth, everything ever observed with all of our instruments, all normal matter – adds up to less than 5% of the universe.
- Statement 2 is correct: Dark matter attracts and holds galaxies together while dark energy repels and causes the expansion of our universe. Both components are invisible.
Source: Article
