Question

Why does every planet revolve around sun .Does sun also has its own gravity ?
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Answer 1

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ᴀɴʏᴡᴀʏ, ᴛʜᴇ ʙᴀsɪᴄ ʀᴇᴀsᴏɴ ᴡʜʏ ᴛʜᴇ ᴘʟᴀɴᴇᴛs ʀᴇᴠᴏʟᴠᴇ ᴀʀᴏᴜɴᴅ, ᴏʀ ᴏʀʙɪᴛ, ᴛʜᴇ sᴜɴ, ɪs ᴛʜᴀᴛ ᴛʜᴇ ɢʀᴀᴠɪᴛʏ ᴏғ ᴛʜᴇ sᴜɴ ᴋᴇᴇᴘs ᴛʜᴇᴍ ɪɴ ᴛʜᴇɪʀ ᴏʀʙɪᴛs. ᴊᴜsᴛ ᴀs ᴛʜᴇ ᴍᴏᴏɴ ᴏʀʙɪᴛs ᴛʜᴇ ᴇᴀʀᴛʜ ʙᴇᴄᴀᴜsᴇ ᴏғ ᴛʜᴇ ᴘᴜʟʟ ᴏғ ᴇᴀʀᴛʜ's ɢʀᴀᴠɪᴛʏ, ᴛʜᴇ ᴇᴀʀᴛʜ ᴏʀʙɪᴛs ᴛʜᴇ sᴜɴ ʙᴇᴄᴀᴜsᴇ ᴏғ ᴛʜᴇ ᴘᴜʟʟ ᴏғ ᴛʜᴇ sᴜɴ's ɢʀᴀᴠɪᴛʏ.

Answer 2

Explanation:

• The planets revolve around, or orbit, the Sun, is that the gravity of the Sun keeps them in their orbits. Just as the Moon orbits the Earth because of the pull of Earth's gravity, the Earth orbits the Sun because of the pull of the Sun's gravity.
• As a star, the Sun is a ball of gas (92.1 percent hydrogen and 7.8 percent helium) held together by its own gravity.