Answer 1:
Correct answer is A
A. Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and is red.
Explanation:
The below Hertzsprung Russell diagram abbreviated H–R diagram, or HRD is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.
Answer 2:
Correct option is A
A. Earth is a part of this galaxy.
Explanation:
The Milky Way galaxy is described as a disk of stars orbiting a central point on the disk. The Milky Way is the galaxy that contains our Solar System. The word "milky" is derived from the galaxy's appearance from Earth: a band of light seen in the night sky formed from stars that cannot be individually detected by the naked eye.
Answer 3:
Option B is correct.
B. The sun is much closer to Earth than other stars are.
Explanation:
Sun is classified as a medium-size star and that many stars are much bigger and brighter because Sun is far more near to the earth as compared to other stars. Other stars are thousands of galaxy years far from earth.
Answer 4:
Option A is correct.
A. red giant
Explanation:
Sun is a sphere-shaped star made up of hot plasma, with an internal convective motion that creates a magnetic field via a dynamic process. It is the most important source of energy for life on Earth.
Answer 5:
Option A is correct.
A. A comet
Explanation:
In November 2013 an object orbiting the sun seemed to disappear behind the sun. When a satellite did not detect the object, astronomers thought that the object had been destroyed when it passed close to the sun. However, when another satellite detected a small, bright object with a fan-shaped tail, astronomers proposed that the object was not destroyed. After that it was concluded as a comet.
A comet is an icy tiny Solar System body. When it passes near the sun it gets warmer This produces an apparent atmosphere or coma, and sometimes also leave a tail.
