Red shift of light from distant stars

Blue shift of light from distant starts

4.6 billion years

14 million years ago

13.8 billion years ago

4.6 million years ago

expanding

contracting

stays the same size

similar composition of Earth and the Moon

stars appear to move in the night time sky

cosmic background radiation

Ms. Phelan's dog chasing his tail

actually blue.

really far away.

invisible.

moving away from us.

the remaining energy from the big bang.

incredibly hot.

visible to the human eye.

only located in certain places in the universe.

8.13 billion

13.8 billion

1.83 billion

381 million

How our planets and moons formed

How our universe began

How the sun turns hydrogen into helium

How fast light travels through space

The galaxies are moving toward us.

The galaxies are moving away from us.

The universe remains static or unchanged in motion.

None of the above

blueshift, CMB, moon landing.

redshift, IBM, Andromeda galaxy.

redshift, CMB, distribution of elements.

doppler effect, light spectra, fusion.

all of the galaxies are spreading out.

the universe must have started from a single point.

the universe is cooling down.

all of the above.

the big bang.

humans came along.

stars began doing fusion.

the redshift was discovered.

Colorful Mystic Background Rehearsal.

Cosmic Mini Butterfly Repellent.

Cosmic Microwave Background Radiation.

Cute Microwave Button Reversal.

is constant.

varies between 20 to 6,000 degrees Fahrenheit.

has increased to about 10,000 degrees Celsius.

has cooled to about 2.7 Kelvin.

water

hydrogen

oxygen

carbon

Both of these stars are moving away from us.

Both of these stars are moving towards us.

Both of these stars are blueshifted.

The star Sirius is closer to us.

The CMB.

The Milky Way.

The universe in the future.

A redshifted star.