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syfry's latest activity
S
syfry
replied to the thread
Suggestion
Why is there no 'history of physics' forum?
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Context from history adds a vital perspective and makes science come alive. Students study the history of models and theory, right...
Apr 15, 2024
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syfry
reacted to
pines-demon's post
in the thread
Suggestion
Why is there no 'history of physics' forum?
with
Like
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I think this can be handled in two ways. First, we do have a history forum, it is just mixed with a lot of other things (art, music...
Apr 15, 2024
S
syfry
replied to the thread
Suggestion
Why is there no 'history of physics' forum?
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Out of curiosity, 1.2 messages posted in which area... in the lounge under the exciting sub forum of feedback and announcements? We can...
Apr 14, 2024
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syfry
reacted to
davidjoe's post
in the thread
The one correct response to an insincere apology
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Like
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I’m going to assume the OP’s described scenario is actually what happened, but this will fit a lot of similar situations. I would...
Apr 13, 2024
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syfry
replied to the thread
The one correct response to an insincere apology
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Your words could resemble an apology if you work on your phrasing and sincerity more. Inspired by #13.
Apr 13, 2024
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syfry
reacted to
Baluncore's post
in the thread
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How did ancient astronomers track changes in positions of stars?
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The "fixed" stars were assumed to be fixed. Early astronomers did not notice any movement. The farmers and fishermen, who fed the...
Feb 27, 2024
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syfry
replied to the thread
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How did ancient astronomers track changes in positions of stars?
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Forgot to ask, does this part from Wikipedia mean that the stars do move at a 26,000 year pace, and did ancient astronomers notice? "...
Feb 27, 2024
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syfry
replied to the thread
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How did ancient astronomers track changes in positions of stars?
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Thanks for pointing that out. 👊 Does that mean they did or didn't notice the stars move? (with such slow changes from the 26,000 year...
Feb 27, 2024
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syfry
reacted to
Baluncore's post
in the thread
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How did ancient astronomers track changes in positions of stars?
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Like
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So this thread has nothing to do with the movement of the fixed stars, and everything to do with the precession of the equinoxes...
Feb 27, 2024
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syfry
reacted to
Vanadium 50's post
in the thread
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How did ancient astronomers track changes in positions of stars?
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Like
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What assumptions? That Hipparchus' writings are lost? That Ptolemy measured angles? The exact instruments are not known. It is known...
Feb 26, 2024
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syfry
replied to the thread
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How did ancient astronomers track changes in positions of stars?
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Citation please. Thanks for replying. 👍 I had problems finding out how they tracked that stars had slightly moved from their position...
Feb 26, 2024
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syfry
replied to the thread
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How did ancient astronomers track changes in positions of stars?
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An article in Britannica and another in Wikipedia had led me to the conclusion. From Wikipedia: "Earth's precession was historically...
Feb 26, 2024
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syfry
reacted to
Steve4Physics's post
in the thread
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How did ancient astronomers track changes in positions of stars?
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Like
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Astrolobes have been around for 2000+ years so are probably part of the answer.
Feb 26, 2024
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syfry
posted the thread
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How did ancient astronomers track changes in positions of stars?
in
Astronomy and Astrophysics
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They might've used water clocks under candlelight to track time by dripping to marked levels of water. They might've used star dials...
Feb 26, 2024
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syfry
replied to the thread
B
How to add an object's multiple relativistic speeds from x, y, and z?
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Now seeing the big flaw in my scenario. It's apparent by visualizing lower speeds on a globe, no math needed. If the x we're traveling...
Feb 26, 2024
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