Astronomy 03/25

In 1974 the first binary pulsar was discovered. What is its name?

• Hulse-Taylor binary

• Mizar & Alcor

• Sirius A & B

• Cygnus X-1

In Einstein Field Equations, for what do we need the cosmological constant now?

• To make the universe static

• To account for the accelerated expansion of the universe.

• We don't

• To account for the shrinking of the universe.

The left hand side of Einstein Field Equations stands for...?

• The gravitational constant.

• The force of gravity.

• The curvature of space-time.

• The energy and momentum in the universe.

When did Einstein publish his Theory of General Relativity?

• 1905

• 1916

• 1929

• 2015

Time slow down when ...

• space-time curves more

• space-time curves less

What is happening here? How come we see this galaxy warped and multiple times, forming a smiley?

• Gravitational lensing

• Gravitational waves

• The galaxy is being sucked into a black hole

• This is photoshopped...

What does LIGO detect?

• Gravitational lensing

• The amount of dark matter in the universe.

• Gravitational waves

• The speed of light.

What causes gravitational waves?

• We do not know.

• They do not exist.

• The shrinking and expanding of the universe.

• Heavy objects accelerating through space-time.