Stars

Stars

By Hannah C

Multiple Choice

How big is the biggest star?

(M = Solar mass, 1 solar mass = the mass of the sun)

• 265 M

• 358 M

• 183 M

• 735 M

​One solar mass is equivalent to the mass of the sun. The largest star is ​R136a1 and it has a solar mass of 265. The largest that a star can be is 300 solar masses. The smallest star recorded is OGLE TR 122b which is 0.095 M. The smallest that a star can be is 0.07 or 0.08 M and the average star size is between 0.5 to 8 M.

Multiple Choice

What does a star's life length depend on?

• Its size

• Its mass

• Its brightness

• Its temperature

​How long a star lives depends on the star's mass. ​The larger the star, the shorter its life because it burns up its fuel faster. The smaller it is, the longer its life. The average star lives for about a few hundred million years.

Multiple Choice

What is the average temperature of a star?

• 20,940 to 40,780 degrees Fahrenheit

• 1,930 to 3,480 degrees Fahrenheit

• 8,130 to 14,980

  degrees Fahrenheit

• 4,760 to 12,140 degrees Fahrenheit

​The average temperature of a star is between 4,760 and 12,140 degrees Fahrenheit. The coldest star is a brown dwarf called WISE J085510.83-071442.5 and it has temperatures ranging between -54.4 and 8.6 degrees Fahrenheit. The hottest star is WR 102 which is 377,540.33 degrees Fahrenheit.

Multiple Choice

Which of these is a type of star?

• E

• X

• M

• L

​There are 7 main types of stars, O, B, A, F, G, K, and M. They are categorized into these groups based on their temperatures. But there are also some other types like Protostars, T Tauri Stars, Main Sequence Stars, Red Giant Stars, White Dwarf Stars, Red Dwarf Stars, Neutron Stars, and Supergiant Stars. Our sun is a type G star and a Main Sequence Star.

Multiple Choice

Can stars be different colors?

• Yes

• No

​Stars can be different colors. They can be blue, white, yellow, orange, and red. Their color is based on their temperature. Blue being the hottest and red the coldest.