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What type of galaxy is Milky Way ?

Spiral
Round
Elliptical
Square

Milky.jpg

Our solar system is in Milky Way. It got its name Milky Way because there is an appearance of dim glowing band in the night sky. Its shape is spiral where most of the stars are in the central bar.

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Comets are clearly distinguished from asteroids by

Brightness
Size
Tail
Distance

Comet.jpg

Comets are distinguished from asteroids by the presence of a coma or a tail. However, extinct comets that have passed close to the Sun many times have lost nearly all of their volatile ices and dust and may come to resemble small asteroids

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What is the meaning of the word "Astro" ?

Star
Moon
Planet
All above

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In Greek words, astro means star and nomy means law of the stars.

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What is a 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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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 comet nuclei are among the least reflective objects found in the Solar System.

Asphalt
None
Halleys Comet
Comet Borrelly

HellyComet.jpg

Also known as Comet Halley, it is mostly visible from earth in every 70 to 80 years. It was last seen in 1986 and will now be seen around 2061.

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Which is the biggest planet in our solar system ?

Mars
Jupiter
Earth
Pluto

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It is 2.5 times all the mass of all the other planets put together. It is composed largely of hydrogen and helium. Jupiter has sixty-three known satellites. Its diameter is 142,984 km at its equator. You could line up 11 Earths side by side, and they would not quite equal the width of Jupiter.

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What is the average orbital period of Short-period comets ?

10 Years
50 Years
100 Years
200 years

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Identify this constellation.

Sagittarius.jpg
Sagittarius
Crux
Carina
Musca

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Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer

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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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