universe & solar system section 10 MCQ Questions & Answers Detailed Explanation

Answer: (d)

1 Sidereal year = 365.2564 days;

1 Tropical year = 365.2422 days;

So difference is 0.0142 days.

Answer: (c)

Answer: (a)

The outermost layer of the sun is the corona. Only visible during eclipses, it is a low-density cloud of plasma with higher transparency than the inner layers. The white corona is a million times less bright than the inner layers of the sun but is many times larger.

A corona is a type of plasma “atmosphere” of the Sun or other celestial body, extending millions of kilometers into space, most easily seen during a total solar eclipse, but also observable in a coronagraph.

The word “corona” itself derived from Latin, meaning crown. The high temperature of the corona gives it unusual spectral features

Answer: (b)

A nautical mile is based on the circumference of the planet Earth. If you were to cut the Earth in half at the equator, you could pick up one of the halves and look at the equator as a circle. You could divide that circle into 360 degrees.

You could then divide a degree into 60 minutes. A minute of arc on the planet Earth is 1 nautical mile. A nautical mile is1.1508 miles or 6,076 feet.

Answer: (b)

Answer: (a)

Neutron star is also known as Pulsar. A neutron star is a type of stellar remnant that can result from the gravitational collapse of a massive star.