Earth
Venus
Mercury
Mars
C. Mercury
5000°C
6000°C
7000°C
212°C
365 days
365 days and 6 months
364 days
366 days
8 seconds
8 minutes
4.3 seconds
1 light year
Melanesia, Micronesia and Polynesia
Polynesia, Micronesia and Melanesia
Melanesia, Polynesia and Micronesia
Micronesia, Polynesia and Melanesia
Hydrogen and oxygen
Carbondioxide and oxygen
Hydrogen and hydrogen compounds
Nitrogen and helium
5th
4th
6th
3rd
days and nights are of equal lengths in the Northern Hemisphere
Nights are longer than days in the Southern Hemisphere
Days and nights are of equal lengths at the poles
Night is equal to 24 hours at the North Pole
9
6
7
10
12757 km
17257 km
17527 km
17572 km
Proxima Centaury
Alfa Centaury
Dog Star
Constellation
Earth
Mars
Uranus
Neptune
QSO
Black Hole
Neutron Star
Black Dwarf
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
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
Perigee
Apogee
Perihelion
Aphelion
0.825
0.98
0.998
0.02
Chromosphere
Sunspots
Sun surface
Photosphere
25 million yrs
100 million yrs
250 million yrs
500 millionyrs
The 180° meridian
The O° meridian
The 90° meridian
The 135° meridian
Mars and Jupiter
Earth and Venus
Neptune and Pluto
Jupiter and Saturn
4.3 seconds
4.3 years
4.3 minutes
4.3 hours
Venus
Mercury
Pluto
Neptune
17214 km
12741 km
12714 km
17124 km
14°C
24°C
34°C
20°C
Increases
Decreases
Remains unchanged
First increases and then decreases
Jupiter
Saturn
Neptune
Pluto
150 million km
145 million km
155 million km
140 million km
Cosmic or Galactic Year
Mean Solar Year
Sidereal Year
Leap Year
East to West
South to North
North to South
West to East