🇰 🌀 🇱 🇦 🇳 🇦 🇰 🇮 @pawb.social to Ask Science@lemmy.worldEnglish · 25 days agoIs it possible that a new star could appear in the sky because a star really, really far away's light only just reached us?message-squaremessage-square5linkfedilinkarrow-up11arrow-down10file-text
arrow-up11arrow-down1message-squareIs it possible that a new star could appear in the sky because a star really, really far away's light only just reached us?🇰 🌀 🇱 🇦 🇳 🇦 🇰 🇮 @pawb.social to Ask Science@lemmy.worldEnglish · 25 days agomessage-square5linkfedilinkfile-text
minus-squarewewbull@feddit.uklinkfedilinkEnglisharrow-up1·23 days agoIt doesn’t really matter how long it takes. There will be a day in that period when it becomes visible.
minus-squareAceSLive@lemmy.worldlinkfedilinkEnglisharrow-up0·23 days agoWell, not exactly… Sure, hair grows long over time - but there isn’t really a day where you’d look at someone and suddenly see the “Long hair” … It happens gradually…
minus-squarewewbull@feddit.uklinkfedilinkEnglisharrow-up1·23 days agoHair grows over time and yesterday it was under 3 inches today it’s over 3 inches. A tiny change over a threshold. There’s a threshold of visibility for stars. Yesterday it wasn’t visible to the eye. Today it’s barely visible.
It doesn’t really matter how long it takes. There will be a day in that period when it becomes visible.
Well, not exactly…
Sure, hair grows long over time - but there isn’t really a day where you’d look at someone and suddenly see the “Long hair” … It happens gradually…
Hair grows over time and yesterday it was under 3 inches today it’s over 3 inches. A tiny change over a threshold.
There’s a threshold of visibility for stars. Yesterday it wasn’t visible to the eye. Today it’s barely visible.