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ASTRO 7N EXAM 3 LATEST 2025 / 2026 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (100% VERIFIED ANSWERS)
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The sun is composed of mostly: - Answer-hydrogen (73%)
and helium (25%)
How does the sun stay stable? - Answer-there is a balance of gravity that pushes inward, and gas pressure that pushes outward
What drives the gas pressure in the sun that pushes the sun outward? - Answer-Process called nuclear fusion that occurs at 15MM degrees Kelvin that produces energy
What is the conversion of the suns diameter to the earths?
- Answer-One sun diameter is 109 earth diameters.
What is the conversion of mass from the sun to earth? - Answer-One sun mass is 333,000 earth masses
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Luminosity - Answer-the true brightness of an object
How bright is the sun? - Answer-4 x 10^24 100-watt bulbs
99.9% of ALL THE MASS in the solar system is in the - Answer-Sun ALONE
How long has the sun been shining? - Answer-4.50 bn years and it will CONTINUE to shine for another 5.50 bn years
Sunspots - Answer-slightly cooler areas on the surface of the sun that - due to magnetic activity - prevent hot material from rising in that region.
How long is a sunspot cycle - Answer-11 years
Nuclear fusion - Answer-the energy source of stars (the force that pushes against gravity to keep the sun in place)
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