Quasars
b) Pulsar
Aurora Borealis
White Dwarfstar
C. Aurora Borealis
4, 2, 3, 1
4, 2, 1, 3
2, 4, 3, 1
4, 2, 3, 1
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
July-4
December-22
September-23
June-21
Venus
Mercury
Mars
Saturn
Venus
Earth
Mars
Uranus
Comet
Great Bear
Meteores
Asteroides
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
Perigee
Apogee
Perihelion
Aphelion
A gulf is big and a bay is small
A gulf is at a rivermouth and a bay is not
A bay is surrounded by cliffs and a gulf by lowland
Both are part of the sea that extend considerably into the land, but a bay usually has a wider entrance than a gulf
Alfa Centaury
Sun
Proxima Centaury
Dog Star
Mars and Jupiter
Earth and Venus
Neptune and Pluto
Jupiter and Saturn
Sunspots
Pulsars
White Dwarfstar
Supernova
40067 km
50067 km
4067 km
5067 km
Cosmic or Galactic Year
Mean Solar Year
Sidereal Year
Leap Year
Earth and the Sun
Earth and the Moon
Jupiter and the Sun
Pluto and the Sun
24 hours
20 hours
365 % days
366 days
Moon
Ganymede
Europa
Cheron
One star
Two stars
Three stars
Four stars
12757 km
17257 km
17527 km
17572 km
North
South
East
West
undulations on the solar surface
huge magnetic storms on the solar surface
places with adequate sunshine
places of tourist importance
June-21
December-22
March-21
September-23
Aurora Australis
Quasars
Aurora Borealis
Pulsar
5th
4th
6th
3rd
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
Venus
Mercury
Uranus
Mars
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
The Earth comes between the Sun and the Moon
The Moon passes between the Sun and the Earth
The Sun comes between the Earth and the Moon
The Planets of the Solar System lies on the same plane
Position of the Sun during summer solstice
Position of the vertical Sun during winter solstice
A star showing the position of the South Pole
Point of intersection of Antarctic Circle and the Prime Meridian
Jupiter
Saturn
Mars
Venus