Tag: stars

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Multiple choice physics life cycle of stars evolution and end stages of stars the stars stars

______________are the result of exploding stars that initially are more than about eight times the sun's mass.

  1.  stars

  2. black hole

  3. supernova

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A supernova is the violent explosion of a massive star, typically one that is at least eight times the mass of the Sun, occurring at the end of its life cycle.

Multiple choice physics life cycle of stars evolution and end stages of stars the stars stars

Which of the following is the stage where a massive star explodes and releases a lot of energy?

  1. Red supergiant

  2. Blackhole

  3. Main sequence

  4. Supernova
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stars with very large masses can become black holes. A black hole releases a huge amount of gravitational energy, as material swirls toward its event horizon. This energy produces a jet of particles that streams over a distance of 300,000 light-years.

Multiple choice physics life cycle of stars evolution and end stages of stars the stars stars

The constellation of stars appear at different positions in the sky at different times during night mainly ________________________.

  1. Because earth rotates about its axis

  2. Because Earth revolves round the sun

  3. Because of optical illusion

  4. Because celestial bodies are changing their positions all the time
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The apparent motion of stars and constellations across the sky during the night is primarily caused by the rotation of the Earth on its axis, which makes the celestial sphere appear to rotate in the opposite direction.