Question

What is a white hole?​

Answer 1

ɪɴ ɢᴇɴᴇʀᴀʟ ʀᴇʟᴀᴛɪᴠɪᴛʏ, ᴀ ᴡʜɪᴛᴇ ʜᴏʟᴇ ɪs ᴀ ʜʏᴘᴏᴛʜᴇᴛɪᴄᴀʟ ʀᴇɢɪᴏɴ ᴏғ sᴘᴀᴄᴇᴛɪᴍᴇ ᴀɴᴅ sɪɴɢᴜʟᴀʀɪᴛʏ ᴡʜɪᴄʜ ᴄᴀɴɴᴏᴛ ʙᴇ ᴇɴᴛᴇʀᴇᴅ ғʀᴏᴍ ᴛʜᴇ ᴏᴜᴛsɪᴅᴇ, ᴀʟᴛʜᴏᴜɢʜ ᴇɴᴇʀɢʏ-ᴍᴀᴛᴛᴇʀ ᴀɴᴅ ʟɪɢʜᴛ ᴄᴀɴ ᴇsᴄᴀᴘᴇ ғʀᴏᴍ ɪᴛ.

Answer 2

$\star{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}}$

$\mathbb\green{⎝⎝\:White\: Hole\:↦}$ In general relativity, a $\sf\pink{white \:hole }$ is a hypothetical region of spacetime and singularity which cannot be entered from the outside, although energy-matter and light can escape from it.❤