Essy on rotation;p ♥️
Answers
Ello :)
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The earth rotates about an imaginary line that passes through the North and South Poles of the planet. This line is called the axis of rotation. Earth rotates about this axis once each day (approximately 24 hours). Although you most likely already knew that fact, there is a slight complication most people are not aware of.
More specifically, our rotation period (the time elapsed for one rotation) with respect to the stars is called a sidereal day. A sidereal day is 24 sidereal hours, or 23 hours and 56 minutes on a normal clock. Our clock time is based on the earth's rotation with respect to the sun from solar noon to solar noon. This is a solar day, and it is divided into 24 hours. Because Earth travels about 1 / 365 of the way around the sun during one day, there is a small difference between solar time and sidereal time.
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ᴀ ʀᴏᴛᴀᴛɪᴏɴ ɪs ᴀ ᴄɪʀᴄᴜʟᴀʀ ᴍᴏᴠᴇᴍᴇɴᴛ ᴏғ ᴀɴ ᴏʙᴊᴇᴄᴛ ᴀʀᴏᴜɴᴅ ᴀ ᴄᴇɴᴛᴇʀ (ᴏʀ ᴘᴏɪɴᴛ) ᴏғ ʀᴏᴛᴀᴛɪᴏɴ. ᴀ ᴛʜʀᴇᴇ-ᴅɪᴍᴇɴsɪᴏɴᴀʟ ᴏʙᴊᴇᴄᴛ ᴄᴀɴ ᴀʟᴡᴀʏs ʙᴇ ʀᴏᴛᴀᴛᴇᴅ ᴀʀᴏᴜɴᴅ ᴀɴ ɪɴғɪɴɪᴛᴇ ɴᴜᴍʙᴇʀ ᴏғ ɪᴍᴀɢɪɴᴀʀʏ ʟɪɴᴇs ᴄᴀʟʟᴇᴅ ʀᴏᴛᴀᴛɪᴏɴ ᴀxᴇs. ɪғ ᴛʜᴇ ᴀxɪs ᴘᴀssᴇs ᴛʜʀᴏᴜɢʜ ᴛʜᴇ ʙᴏᴅʏ's ᴄᴇɴᴛᴇʀ ᴏғ ᴍᴀss, ᴛʜᴇ ʙᴏᴅʏ ɪs sᴀɪᴅ ᴛᴏ ʀᴏᴛᴀᴛᴇ ᴜᴘᴏɴ ɪᴛsᴇʟғ, ᴏʀ sᴘɪɴ. ᴀ ʀᴏᴛᴀᴛɪᴏɴ ᴀʙᴏᴜᴛ ᴀɴ ᴇxᴛᴇʀɴᴀʟ ᴘᴏɪɴᴛ, ᴇ.ɢ. ᴛʜᴇ ᴇᴀʀᴛʜ ᴀʙᴏᴜᴛ ᴛʜᴇ sᴜɴ, ɪs ᴄᴀʟʟᴇᴅ ᴀ ʀᴇᴠᴏʟᴜᴛɪᴏɴ ᴏʀ ᴏʀʙɪᴛᴀʟ ʀᴇᴠᴏʟᴜᴛɪᴏɴ, ᴛʏᴘɪᴄᴀʟʟʏ ᴡʜᴇɴ ɪᴛ ɪs ᴘʀᴏᴅᴜᴄᴇᴅ ʙʏ ɢʀᴀᴠɪᴛʏ. ᴛʜᴇ ᴀxɪs ɪs ᴄᴀʟʟᴇᴅ ᴀ ᴘᴏʟᴇ.
нσρє ıтs нєłρ ㋡
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