Light year
Nautical mile
Statute mile
Kilometre
A. Light year
QSO
Black Hole
Neutron Star
Black Dwarf
Sirius
Proxima Centaury
Orion
Pole Star
spiral
elliptical
circular
spherical
Earth
Jupiter
Mercury
Venus
They have to pay a tax
Ships going west from the USA lose a day, ships going east from Japan and Australia gain a day
They have to report at the customs post
They have to check their clocks agains
Atmospheric composition
Thermal conditions
Occurrence of ice caps and frozen water
Occurrence of ozone
1.41
1.47
0.59
0.5
Light year
Nautical mile
Statute mile
Kilometre
17214 km
12741 km
12714 km
17124 km
23 hours 56 minutes
24 hours
23 hours 46 minutes
24 hours 4 minutes
White Dwarf
Black Dwarf
Quasar
All of the above
Columbus
Varahmihir
Aryabhat
Copernicus
1, 4, 3, 2
4, 2, 1, 3
4, 1, 2, 3
4, 1, 3, 2
Venus
Uranus
Earth
Jupiter
21,000 km
16,800 km
18,600 km
12,500 km
longitudes
latitudes
rivers
direction of winds
Revolution
Rotation
Inclination of the earth's axis
Geoid shape of the earth
The Dead Sea
The Aral Sea
The Caspian Sea
Lake Baikal
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
23 hours 56 minutes
24 hours
23 hours 46 minutes
24 hours 4 minutes
9
6
7
10
4, 2, 3, 1
4, 2, 1, 3
2, 4, 3, 1
4, 2, 3, 1
40000 km
4000 km
50000 km
5000 km
Perigee
Perihelion
Aphelion
Apogee
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
The Earth is the densest of all the Planets in our Solar System
The predominant element in the composition of Earth is silicon
The sun contains 75 per cent of the mass of the Solar System
The diameter of the Sun is 190 times that of the Earth
Direction or path of the Moon
The Moon comes between the Sun and the Earth
The Earth comes in between the sun and the Moon and the centres of all the three come on the same straight line
The average angle made by a line drawn from the Moon to the Earth
1/81
1/18
1/27
1/72
wanderer
settlement
light
a smaller companion to anything
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