Universe,Galaxy,Solar System and Space : GK Question answers .It will be very helpful for enhancing the General Knowledge for Competitive Exam (like UPSC-prelims, SSC, State Services, NDA, CDS, and Railways,Kerala PSC etc.), Bank Exam and Entrance Exam.

: 1

Which star is at the center of our Solar System?

: 2

What is the diameter of Sun?
1,392,684 km (865,374 mi).

: 3

What percent of the solar system’s mass does Sun holds?
99.8 percent.

: 4

How many stars are in the Milky Way?
more than 100 billion.

: 5

When was Sun born?
roughly 4.6 billion years ago.

: 6

What is the distance between sun and earth?
92,960,000 miles (149,600,000 km).

: 7

Sun’s Chemical Composition:
71% of Hydrogen, 26.5% Helium and2.5% of other elements.

: 8

How much time does sun rays take to reach earth?
8 minutes.

: 9

Which planet isnearest tothe earth?

: 10

Which planet is known as the Morning Star or the Evening Star?

: 11

What is the diameter of MERCURY?
3,032 miles (4,879 km).

: 12

What is the diameter of VENUS?
7,521 miles (12,104 km).

: 13

What is the diameter of EARTH?
7,918 miles (12,742 km).

: 14

What is the diameter of MARS?
4,212 miles (6,779 km)

: 15

What is the diameter of JUPITER?
86,881 miles (139,822 km).

: 16

What is the diameter of SATURN?
120 536 kilometers

: 17

What is the diameter of URANUS?
31,518 miles (50,724 km).

: 18

What is the diameter of NEPTUNE?
30,599 miles (49,244 km).

: 19

What is the diameter of PLUTO?
2360 kilometers.

: 20

Which is the largest planet in our solar system?

: 21

Which Planet Has the Most Moons?
Jupiter with 66 moons.

: 22

Which planet is closest to the sun?

: 23

Which Is the Hottest Planet in the solar system?

: 24

Which Planets Have Rings around Them?
Saturn,Jupiter, Uranus, and Neptune (4 planets).

: 25

Which is the coldest andsmallest of all planets?

: 26

Which Star is called Earth’s satellite?

: 27

What is the Average distance of Moon from Earth?
238,855 miles (384,400 km).

: 28

What is the age of Moon?
4.527 billion years.

: 29

What is the Orbital period of Moon?
27 days.

: 30

What is the Circumference of Moon?
6,784 miles (10,917 km).

: 31

Which planet has the most volcanoes?

: 32

Which planets do not have moons?
Mercury and Venus.

: 33

How much larger the Sun is than Earth?
300000 times.

: 34

When the Halley’s Comet will be visible from Earth again?

: 35

What is the surface temperature of Venus?
over 450 degrees Celsius.

: 36

When was the Solar System formed?
around 4.6 billion years ago.

: 37

A person who weighs 200 pounds on earth, what would he weigh on the surface ofMars?
76 pounds.

: 38

Which Planet spins backwards relative to the others?

: 39

When was the first man made object sent into space?

: 40

Name Jupiter’s 4 biggest moons:
Europa, Ganymede, Callisto and Io.

: 41

Why do we have high & low tides?
because of the Sun & Moons gravity.

: 42

Where is The “edge of space” located?
100 km (62 mi) above sea level.

: 43

What is an astronaut employed by the Russian Federal Space Agency called?

: 44

Who was the first person to reach space?
Yuri Gagarin, in 1961.

: 45

Who was the first woman to reach space?
Valentina Tereshkova, in 1963.

: 46

Name five recognized dwarf planets :
Pluto, Ceres, Eris, Makemake & Haumea.

: 47

The Moon orbits the Earth every –
27.3 days.

: 48

Who was the first person to set foot on the Moon?
Neil Armstrong.

: 49

What is the average surface temperature of the Moon?
107 degrees Celsius during the day and -153 degrees Celsius at night.

: 50

When does a lunar eclipse occur?
when the Earth is between the Sun and the Moon.

: 51

At how mush speed Moon moves across the Sun?
2,250 km per hour.

: 52

How long a solar eclipse can last?
7 and a half minutes.

: 53

What is the Equatorial Circumference of Earth?
40,030 km.

: 54

What is Earth’s surface temperature?
-88 to 58°C.

: 55

When was the Earth formed?
approximately 4.54 billion years ago.

: 56

How many natural satellites of Earth are there?
one, Moon.

: 57

What are the notable satellites of Mars?
Phobos & Deimos.

: 58

Which planet has approximately the same landmass as Earth?

: 59

What are the notable satellites of Pluto?
Charon, Nix, Hydra, Kerberos and Styx.

: 60

When was the Pluto reclassified from a planet to a dwarf planet?
in 2006.

: 61

How many stars are there in Andromeda Galaxy?
1 trillion.

: 62

At which speed the Andromeda Galaxy is approaching the Milky Way?
at approximately hundred to hundred and forty kilometers per second.

: 63

What is the diameter of MERCURY?
3,032 miles (4,879 km).

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