Fill in the blank:
The Morgan-Keenan Spectral Classification is used to classify stars in astrophysics by the ______ temperature, which is related to spectral patterns.
"surface"
200
What element do the hydrogen atoms in the core fuse into during nuclear fusion?
Helium atoms
200
What is the colour of the star with the hottest surface temperature?
Bluish.
200
List the 7 main types of classification.
OBAFGKM
300
What does a star with a solar mass of 10-30 turn into after supernova?
Neutron Star (pulsar)
300
What is the difference between apparent magnitude and absolute magnitude?
Apparent is the brightness of stars as they appear from earth, while absolute is the brightness of stars as if they were all located 33 light years away.
300
What class is our sun in the Morgan-Keenan scale?
Class G.
400
Why can't black holes be seen?
Because they absorb light and do not let it escape.
400
What does knowing the composition of a star can help scientists figure out?
The star's temperature.
400
What is the most common Class?
Class M
500
When does nuclear fusion stops?
When there is only iron left.
500
In kilograms, what is 1 solar mass?
2X10^30 kg
500
How much times greater in diameter is Class O than G