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November 28, 2025 1 min
# This is your Astronomy Tonight podcast.

Good evening, stargazers! Today is November 28th, and we're celebrating one of the most dramatic cosmic events in modern astronomy history!

On this date in 1612, one of the greatest astronomical "oops" moments occurred when **Galileo Galilei observed Jupiter through his telescope and unwittingly discovered Neptune** – but then completely forgot about it! Well, not entirely forgot, but he didn't recognize what he was seeing for what it truly was.

You see, Galileo was actually tracking Jupiter and its moons when he noticed a faint "star" near the giant planet. He even sketched it in his observing notes, but here's the kicker: he thought it was just another background star! The man had literally stumbled upon the eighth planet in our solar system, and he had no idea. It would take another **246 years** – until 1846 – for Neptune to be officially discovered and recognized as a full-fledged planet!

Imagine the cosmic irony: Galileo revolutionized astronomy with his telescope, expanded our understanding of the heavens, and managed to document a major planet without realizing he'd made history. It's like accidentally taking a winning lottery ticket and using it as a bookmark!

So tonight, when you look up at Jupiter, give a little thought to Galileo and that mysterious point of light he observed centuries ago – a reminder that sometimes the universe's greatest secrets are hiding in plain sight.

**Please subscribe to the Astronomy Tonight podcast!** And if you want more detailed information about tonight's cosmic events, check out **QuietPlease.AI**. Thank you for listening to another Quiet Please Production!

This content was created in partnership and with the help of Artificial Intelligence AI
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Transcript

Episode Transcript

Available transcripts are automatically generated. Complete accuracy is not guaranteed.
Speaker 1 (00:00):
This is your Astronomy Tonight podcast. Good evening, stargazers. Today
is November twenty eighth, and we're celebrating one of the
most dramatic cosmic events in modern astronomy history on this date.
In sixteen twelve, one of the greatest astronomical oops moments
occurred when Galileo Galilei observed Jupiter through his telescope and

(00:21):
unwittingly discovered Neptune, but then completely forgot about it. Well,
not entirely forgot, but he didn't recognize what he was
seeing for what it truly was. You see, Galileo was
actually tracking Jupiter in its moons when he noticed a
faint star near the giant planet. He even sketched it
in his observing notes. But here's the kicker. He thought

(00:44):
it was just another background star. The man had literally
stumbled upon the eighth planet in our Solar system, and
he had no idea It would take another two hundred
and forty six years until eighteen forty six for Neptune
to be a officially discovered and recognized as a full
fledged planet. Imagining the cosmic irony, Galileo revolutionized astronomy with

(01:09):
his telescope expanded our understanding of the heavens, and managed
to document a major planet without realizing he'd made history.
It's like accidentally taking a winning lottery ticket and using
it as a bookmark. So tonight, when you look up
at Jupiter, give a little thought to Galileo and that
mysterious point of light he observed centuries ago, a reminder

(01:32):
that sometimes the universe's greatest secrets are hiding in plain sight.
Please subscribe to the Astronomy Tonight podcast, and if you
want more detailed information about tonight's cosmic events, check out
Quiet Please dot Ai. Thank you for listening to another
Quiet Please production
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