8. Our sun is in which phase of its life? Nuclear fusion will burn all of the hydrogen in its core and then it will begin its next phase of life. Astronomers estimate this will be when?

Question

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1 point
Main Sequence; 5 billion years
Protostar; 5 billion years
Main Sequence; 2 billion years
Red Giant; 5 billion years

Answer 1

Main Sequence; 5 billion years

Answer 2

13. In the same simulation, leave the temperature around the middle and adjust the luminosity back and forth. Where would we find a cooler but very bright star on the diagram?
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1 point
Top left
Top right
Bottom left
Middle

Answer 3

Top right

Answer 4

14. Based on the H-R Diagram, white dwarf stars are not as bright as our sun but their temperature is ________. (HINT: Reset show's our sun's temp around 5800K. Check "show luminosity classes" to find white dwarf stars and click that area on the diagram.)
*
1 point
Captionless Image
Hotter
Cooler
The same

Answer 5

Hotter

Answer 6

23. How many stars does Capella consist of?
*
1 point
Captionless Image
1
2
4
6

Answer 7

2

Answer 8

try again

Answer 9

4