Week10/11

Question 1

As the core of the sun gets colder, the outer layer…

Answer 1

Expands and becomes colder

Question 2

The helium in the sun combines with…

Answer 2

Helium

Question 3

Type 1 Super nova needs xxxxx solar massive to explode. Made with carbon, very bright. Nothing left after explosion.

Answer 3

1.4 solar masses

Question 4

What’s the final element from a star?

Answer 4

Iron

Question 5

Type 1 stars are almost always xxxx luminous than type 2

Answer 5

More

Question 6

Are there any remnants to a Type 2 supernova?

Answer 6

Yeah. A neutron star.

Question 7

What size is a neutron star?

Answer 7

10km across, about the size of a city.

Question 8

What causes gamma ray bursts?

Answer 8

Either a hypernova (2 extremely large stars colliding) or 2 neutron stars colliding.

Question 9

How are black holes formed?

Answer 9

If the mass of a neutron star exceeds 3 solar masses.

Question 10

Luminosity period of RR Lyrae stars?

Answer 10

0.5 - 1 day.

Question 11

Luminosity period of Cepheid stars?

Answer 11

1 - 100 days

Question 12

How much more mass is there in spiral galaxies than can be accounted for by visible matter?

Answer 12

3 to 10 times (dark matter)

Question 13

How much of the mass in the galaxy is visible?

Answer 13

5%

Question 14

Tully-Fisher relation corralates a galaxy’s rotation speed with its…

Answer 14

Luminosity

Question 15

How many spirals are in our local group?

Answer 15

3. M33, Milky way, and Andromeda

Question 16

Hubble’s law

Answer 16

Galaxies recede from us faster the furthur further away they are.