ooli@lemmy.world to Space@lemmy.world · 7 天前Deep space radio signal reaches Earth after 8 billion yearswww.earth.comexternal-linkmessage-square6fedilinkarrow-up11
arrow-up11external-linkDeep space radio signal reaches Earth after 8 billion yearswww.earth.comooli@lemmy.world to Space@lemmy.world · 7 天前message-square6fedilink
How do they date a radio transmission?
Reply and say “when did you send this”
New satellite who dis