Stars
What is a ball of gas held together by gravity called?
A star.
What are 90% of stars?
Main sequence stars
What is the name of the galaxy we live in?
The Milky Way
A cloud of gas is called what? (This is the first stage of the life cycle of a star)
Nebula or Stellar Nebula
What is hotter a red giant star or a white dwarf star?
White dwarf
What color is a cool star?
Red
A white dwarf star is made up of only what two elements?
Carbon and oxygen
What are the 3 types of galaxies?
Spiral, Elliptical, and Irregular
What comes after a supergiant star?
Supernova
List the color of stars from hot to cool. (4 colors)
Blue, white, yellow, red.
What is the closest star to Earth?
The Sun.
Stars that are larger and cooler than main sequence stars are called?
Giant and super giant stars
2 PART QUESTION!!!
How many different constellations are there?
Is an asterism a constellation? Yes /No
88 constellations
No! An asterism is a smaller part of a constellation.
What can a supernova turn into?
Black hole or neutron star.
Stars that have small mass will eventually turn into what kind of star (at the end of the life cycle)?
white dwarf
When the gravity in a nebula gets stronger, the cloud gets smaller. True or False?
True
When a giant star explodes, what star is formed?
Planetary nebulla
In the past, what were two uses of constellations?
Navigating at night and keeping track of the seasons (time of year)
What is the characteristic of the star that determines which pathway it will follow?
Size, mass or weight
A nebula is made up of what two elements?
Hydrogen and helium.
What does it mean if you say a star is the 'most luminous'?
It is the brightest star.
What kind of star is the Sun?
Main sequence star
What are two names for the constellation that has the star Polaris apart of it?
Ursa Minor and The Little Bear
Name the 3 possible final stages of a star's life cycle. List in order from largest to smallest in size.
Black hole, neutron star, white/black dwarf
What direction do stars appear to rise and fall in?
rise in the east, fall in the west