Question

1. What is a galaxy?
2. Name the planets from the closest to the farthest from the Sun.
3. Why is the Earth also known as the 'Blue Planet?
4. Who was the first person to walk on the moon?​

Answer 1

Answer:

1) a galaxy is a gravitationally bound system of stars, stellar remnants , interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxies, literally"milky", a reference to the mily way

Explanation:

Answer 2

$\green{{Galaxy}}$

The huge collection of stars, dust, solar system etc.. is called Galaxy.

$\orange{━━━━━</p><p>┃ Solar\:system ┃</p><p>━━━━━ }$

There are 8 planets in our solar system

The closest planet to the sun is Mercury and the farthest planet from the Sun is Neptune.

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Solar system

❍<sun> •<Mercury> ๏<venus> ⊙<Earth> ᐤ<Mars> )<asteroids belt> Ό<Jupiter> Ѻ<saturn> ●<Uranus> ●<Neptune>

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$\red{━━━━━</p><p>┃ Blue\:planet ┃</p><p>━━━━━ }$

The earth is also known as blue planet. This is because 71% of it is covered with water. This make it appear blue from space.

$\blue{━━━━━</p><p>┃ First\:walk\:on\:Moon┃</p><p>━━━━━ }$

Neil Alden Armstrong was the first person to walk on the moon.

He was an American astronaut.

Hope it help☑