How do astronomers know about the future collision of Andromeda and the Milky Way?(1 point)

Question

Responses

The Milky Way has changed course to head toward Andromeda.
The Milky Way has changed course to head toward Andromeda.

The two galaxies have collided previously.
The two galaxies have collided previously.

All galaxies will collide at some point.
All galaxies will collide at some point.

Astronomers have observed their movements over time.

Answer 1

Astronomers have observed their movements over time.

Answer 2

How are the bars in barred spiral galaxies thought to have formed?(1 point)
Responses

separation
separation

slow evolution
slow evolution

merging
merging

primordial collapse

Answer 3

slow evolution

Answer 4

Over time, how will the distribution of matter in a galaxy cluster change?(1 point)
Responses

Clumps of material will become larger and the spaces between them smaller.
Clumps of material will become larger and the spaces between them smaller.

Clumps of material will become smaller and the spaces between them larger.
Clumps of material will become smaller and the spaces between them larger.

Clumps of material will become smaller and the spaces between them smaller.
Clumps of material will become smaller and the spaces between them smaller.

Clumps of material will become larger and the spaces between them larger.

Answer 5

Clumps of material will become larger and the spaces between them smaller.