There’s not really one instant where a new star goes from not shining to shining where a human looking up at night would see a star “turn on.” The process of turning on takes between 10,000 - 1,000,000 years, depending on the size of the star and how many stages you include in the process.
Yes, and as per the comment you originally replied to - there isn’t a moment there where the star appears to “turn on”.
To put it more simply, a star sort of “fades in”. You wouldn’t really percieve the fade beginning, in the same way you don’t perceive hair growing…
Probably not the greatest analogy but I thought it’d help make sense of it…
There’s not really one instant where a new star goes from not shining to shining where a human looking up at night would see a star “turn on.” The process of turning on takes between 10,000 - 1,000,000 years, depending on the size of the star and how many stages you include in the process.
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.
Yes, and as per the comment you originally replied to - there isn’t a moment there where the star appears to “turn on”. To put it more simply, a star sort of “fades in”. You wouldn’t really percieve the fade beginning, in the same way you don’t perceive hair growing… Probably not the greatest analogy but I thought it’d help make sense of it…
I think “barely visible” isn’t going to be a lightbulb turning on moment.