Question

6 fill in the blank 50 points
scientists gather information about the universe from space observations, radiation studies, and the movement of answer objects.
ripples in spacetime caused by massive cosmic events are known as answer.
hydrogen and answer were the first elements to form after the universe began.
when astronomers study the light from distant galaxies, they see that it is stretched toward the answer end of the spectrum.
cosmic microwave background radiation (cmb) is the leftover answer from the early universe.
heat celestial gravitational waves helium blue oxygen red

Explanation:

1. For "Scientists gather information... movement of [Answer] objects": Celestial objects (stars, planets, etc.) are studied for universe info. So "celestial".
2. "Ripples in spacetime... known as [Answer]": Gravitational waves are ripples from massive cosmic events. So "gravitational waves".
3. "Hydrogen and [Answer]... first elements": After Big Bang, hydrogen and helium formed first. So "helium".
4. "Light from distant galaxies... toward [Answer] end": Redshift means light stretches to red end (longer wavelength). So "red".
5. "CMB is leftover [Answer]... early universe": CMB is leftover heat (radiation) from early universe. So "heat".

Answer:

1. celestial
2. gravitational waves
3. helium
4. red
5. heat