June-21
December-22
March-21
September-23
A. June-21
Quasars
Polar Auroras
Meteorites
Pulsar
Perigee
Perihelion
Aphelion
Apogee
21,000 km
16,800 km
18,600 km
12,500 km
40067 km
50067 km
4067 km
5067 km
Blue
White
Black
Crimson Red
6071km
6571km
6371km
6771 km
Polaris
Alpha Centauri
Sun
Sirius
The 180° meridian
The O° meridian
The 90° meridian
The 135° meridian
Venus
Mercury
Uranus
Mars
Jupiter
Saturn
Mars
Earth
Sun
Planet
Satellite
Moon
Perigee
Apogee
Perihelion
Aphelion
Moon
Ganymede
Europa
Cheron
Uranus
Saturn
Pluto
Neptune
Mars
Uranus
Jupiter
Venus
Time taken by the earth to complete one rotation with respect to a fixed star at infinity
Time taken by the earth to complete one revolution with respect to the Moon
Time taken by the earth to complete one rotation with respect to the Moon
Time taken by the earth to complete one rotation with respect to the Sun
5000000 km
500000 km
50000 km
5000 km
24 hours
20 hours
365 % days
366 days
4, 2, 3, 1
4, 2, 1, 3
2, 4, 3, 1
4, 2, 3, 1
Increases
Decreases
Remains unchanged
First increases and then decreases
Mars
Jupiter
Mercury
Venus
1, 2 and 4
1 and 4
1, 3 and 4
1, 2, 3 and 4
365 days
365 days and 6 months
364 days
366 days
Earth's revolution and inclination of its axis
Revolution
Earth's rotation and inclination of its axis
Rotation
Very small size
Very large size
Very high density
Very low density
47 degrees
23.5 degrees
12 degrees
30 degrees
The countries along the Equator are in darkness
The countries along the Equator are at their hottest
The countries along the Equator are at their wettest
The Sun shines vertically over the Equator
The position of the moon farthest from the earth
The position of the earth nearest to the Sun
The position of the moon nearest to the earth
The position of the earth farthest from the Sun
27 days
29 days
29.32 days
27.32 days
A lake is small and a tank is big
A lake has flowing water, a tank has still water
A lake is a geographical feature, a tank is not
Both are land-enclosed water bodies, but the latter is man-made