What is siderial day?
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
Correct Answer :
A. Time taken by the earth to complete one rotation with respect to a fixed star at infinity
Related Questions
The length of its day and the tilt of its axis are almost identical to those of the Earth. This is true or
Uranus
Neptune
Saturn
Mars
The tail of a comet is directed away from the Sun because
as the comet rotates around the Sun, the light mass of the comet is pushed away due to the centrifugal force alone
as the comet rotates, the lighter mass of the comet is attracted by some star situated in the direction of its tail
the radiation emitted by the Sun exerts a radial pressure on the comet throwing its tail away from the Sun
the tail of the comet always exists in the same orientation
Arrange the Outer Planets in increasing order of their sizes.
1. Jupiter
2. Uranus
3. Saturn
4. Neptune
4, 2, 3, 1
4, 2, 1, 3
2, 4, 3, 1
4, 2, 3, 1
The group of small pieces of rock revolving round the Sun between the orbits of Mars and Jupiter are called
meteors
comets
meteorites
asteroids
The most important constituent of the Sun's mass is.
Hydrogen
Helium
Silicon
Iron
1 and 2
2 and 3
3 and 4
1,2 and 4
Going into the interior of the earth the weight of an object
Increases
Decreases
Remains unchanged
First increases and then decreases
What are the Pleides?
Constellation
Asteroides
Meteores
Comets
The Sun contains over ___of the total mass of the Solar System.
0.825
0.98
0.998
0.02
Which of the following is known as the Cold Planet?
Mars
Uranus
Jupiter
Venus
Among the following which planet takes maximum time for one revolution around the Sun?
Earth
Jupiter
Mars
Venus
Charon' is the satellite of _____.
Earth
Saturn
Pluto
Neptune
Which of the following statements best describes longitudes?
An imaginary line on the earth's surface joining the north and south pole
The angular distance east or west of the Greenwich Meridian
The distance of place east or west of the Greenwich Meridian
The position of a place on the Earth surface with reference to the Prime Meridian
Our Solar System is an orderly community of _____.
One star
Two stars
Three stars
Four stars
What happens during the equinoxes?
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
Which one of the following stars is nearest to the Earth?
Polaris
Alpha Centauri
Sun
Sirius
The name of our galaxy is _______
Alfa Centauri
Proxima Centauri
Milky Way
Neptune
Polar Auroras are called __ in Southern Hemisphere.
Aurora Australis
Quasars
Aurora Borealis
Pulsar
What is the primary cause of the day and night?
Revolution
Rotation
Inclination of the earth's axis
Geoid shape of the earth
Equatorial diameter of the Earth is __.
12757 km
17257 km
17527 km
17572 km
What is the distance around the earth at the Equator?
21,000 km
16,800 km
18,600 km
12,500 km
The visible surface of the sun is known as
Chromosphere
Sunspots
Sun surface
Photosphere
What is a narrow waterway separating two bits of land called?
A bay
A gulf
A strait
An isthmus
What is the temperature of the sun estimated at approximately?
5000°C
6000°C
7000°C
212°C
What is the shape of our galaxy 'Milky Way'?
spiral
elliptical
circular
spherical
The study of universe on grand scale is called.
Cosmology
Astronomy
Astrology
Exbiology
Arrange the Inner Planets in decreasing order of their distances from the Sun.
1. Earth
2. Mercury
3. Venus
4. Mars
5. Neptune
1, 4, 3, 2
4, 2, 1, 3
4, 1, 2, 3
4, 1, 3, 2
A leap year consists of
365 days
365 days and 6 months
364 days
366 days
What meridian is the International Date Line?
The 180° meridian
The O° meridian
The 90° meridian
The 135° meridian
What is the geographical term for land's end, that tip of land which projects into the sea?
A headland
A spit
A peninsula
A cape
Planet nearest to the earth is _____.
Venus
Mercury
Mars
Jupiter