1. dust
2. Hubble's constant
3. Local Group
4. Dark matter is massive enough to produce a gravitational redshift and gravitational microlensing in light from nearby stars or galaxies. The mass of visible matter also can be compared to the total mass of a galaxy or cluster. This invisible portion of the total mass is called dark matter.
5. In an expanding universe, objects are moving away from Earth, so the light they emit would have a redshift as observed from Earth. In a decelerating universe, light would have no redshift. Light would have a blueshift in a collapsing universe because all objects in that type universe would be moving toward each other.
The external crust of the Earth consists of a series of tectonic plates moving on the planet's surface. Often volcanoes are created in regions where the plates come together. Volcanoes also can grow in the middle of a rock, which is named "Hot Spot," where the magma rises up until it bursts on the sea floor. A hot spot in the center of the Pacifical Rock is created on the Hawaiians Islands. The plate shifts, while the hot spot remains set. So the chain of the islands that comprise the Hawaiian Island chain was formed when this plate moved over the hot spot.
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Answer:
Number 2- Misreading the data is a very serious issue
Explanation:
