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Which is the smallest planet in the solar system ?

Mercury
Pluto
Earth
Jupitar

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It is the first and smallest planet in the solar system closest to the sun. It has an orbital period of just 88 Earth days. One more thing to note is that Mercury has no atmosphere, and for this reason its surface has greatest temperature variation as compared to other planets.

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Asteroids are believed to be originated from which orbit ?

Orbit of Earth
Orbit of Venus
Orbit of Mars
Orbit of Jupiter

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Asteroids are thought to have a different origin from comets, having formed inside the orbit of Jupiter rather than in the outer Solar System

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What is light-year ?

Unit of energy
Unit of length
Unit of heat
Unit of mass

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As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in a vacuum in one Julian year.

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Which is not true about comets ?

Cometary nuclei are among the least reflective objects found in the Solar System
Carbon mono is contained by Comets
Amino acid glycine is contained by Comets
Because of their low mass, comet nuclei do not become spherical under their own gravity

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What is the speed of light in a perfect vacuum ?

299,792,458 metres per second
399,792,458 metres per second
499,792,458 metres per second
599,792,458 metres per second

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Any piece of stone or iron traveling through the earths atmosphere is known by which name ?

Sun
Meteorite
Moon
Planet

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A meteorite is an outer space object. When it enters the atmosphere of earth, impact pressure causes the body to heat up and emit light, thus forming a fireball, also known as a meteor or shooting star.

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Which is the largest moon in our Solar System ?

Ganymede
Titan
Callisto
Lo

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It is a moon of Jupiter which has a diameter of 5,268 km. It is 8% larger than that of the planet Mercury. It completes an orbit in around seven days. Ganymede is bigger by 2% to its near size moon "Titan" which is second largest moon and largest of Saturn.

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Who created the first star catalog in Greek astronomy ?

Aristillus
Bristillus
Cristillus
Dristillus

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Born in 261 BC, Aristyllus was a Greek astronomer. He worked on fixed stars and presented a true catalog on them.

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What is the estimated Diameter of Milky Way Galaxy ?

10,000 light years
100,000 light years
1,000,000 light years
10,000,000 light years

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Identify this constellation.

Gemini.jpg
Ara
Orion
Taurus
Gemini

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Gemini is one of the constellations of the zodiac. Its name is Latin for "twins", and it is associated with the twins Castor and Pollux in Greek mythology.

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