Tell us something we don’t know.

   #1  

dodge man

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I’m 59 years old, I like to think I learn something every day, even if it’s useless. Share something with us we might not know.

I’ve always been a bit of a star gazer but don’t know a lot about them. My daughter got me a telescope for Christmas. I was looking at Venus one night and I thought it was broken, it was half gone. The inner planets, Venus and Mercury have phases just like the moon. You just don’t normally see them unless magnified.

I should add this doesn’t need to be astronomy related, it can be anything.
 
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2LaneCruzer

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Abraham Lincoln and George Washington had Malaria

Chic-fil-A is closed on Sunday
 
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Snobdds

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I’m 59 years old, I like to think I learn something every day, even if it’s useless. Share something with us we might not know.

I’ve always been a bit of a star gazer but don’t know a lot about them. My daughter got me a telescope for Christmas. I was looking at Venus one night and I thought it was broken, it was half gone. The inner planets, Venus and Mercury have phases just like the moon. You just don’t normally see them unless magnified.

I should add this doesn’t need to be astronomy related, it can be anything.
Astronomy turned out to be my favorite class in college, I took it because I needed a science elective. The universe is fascinating and shows just how insignificant we are on planet earth. It made the little light go off in my head and brought together all the stuff I learned in college. So glad I took it in my final semester of under grad classes.

I was amazed that if light from space travels through a prism, it gives little black lines signifying different types of gasses. These lines never change for each gas. I mean, how did someone discover that? Who just looks into space through a prism and spends enough time doing it to see patterns.

In Wyoming, it's dark with no light pollution. With a little bit of knowledge and a good telescope...Its fun to star gaze.

 
  
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dodge man

dodge man

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I did not know that about Chick-fil-A. I’ve tried to eat there a couple times, we don’t have one in our town, but the lines are stupid long.
 

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jaxs

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Every human has a blind spot in each eye.
Uhh oh,I know that now but didn't before my retinologist told me. I hope that isn't how you came to know.
 

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A watch can be used as a compass. If you point the hour hand at the sun, halfway between the hour hand and the 12 is South. Try it.

Well, sort of. It is within 15 degrees or so but I prefer to rely on my compass.

Funny story though... about 10 years ago we were on a timber cruise. We use a hand held GPS to get near a cruise point, then pace and compass the last 100 feet or so. At breakfast that AM I scoffed at a coworker who said that he always carries two compasses.
An hour into the woods my GPS said bearing to plot was east, so I took out my compass and started pacing. Suddenly I realized that the sun was at my back... at around 8:00 in the morning. WTF?
Somehow my compass had reversed it's polarity, so the north arrow was pointing south. I was wearing a snowboarding coat, and most likely had gotten it too close to one of the magnets in the lapel.
 

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Noon is not the high point of the sun.
 

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Potato starch molecules are the largest molecules known. They can be so large that it is the only individual molecule that a person can see without magnification.
 

bcp

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Well, sort of. It is within 15 degrees or so but I prefer to rely on my compass.

Funny story though... about 10 years ago we were on a timber cruise. We use a hand held GPS to get near a cruise point, then pace and compass the last 100 feet or so. At breakfast that AM I scoffed at a coworker who said that he always carries two compasses.
An hour into the woods my GPS said bearing to plot was east, so I took out my compass and started pacing. Suddenly I realized that the sun was at my back... at around 8:00 in the morning. WTF?
Somehow my compass had reversed it's polarity, so the north arrow was pointing south. I was wearing a snowboarding coat, and most likely had gotten it too close to one of the magnets in the lapel.
Confusus say:

"Man with two compasses never know which is correct"

Bruce
 

Jstpssng

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Confusus say:

"Man with two compasses never know which is correct"

Bruce
Actually he clarified later, and said he carries two in case he loses one.
 

CalG

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Astronomy turned out to be my favorite class in college, I took it because I needed a science elective. The universe is fascinating and shows just how insignificant we are on planet earth. It made the little light go off in my head and brought together all the stuff I learned in college. So glad I took it in my final semester of under grad classes.

I was amazed that if light from space travels through a prism, it gives little black lines signifying different types of gasses. These lines never change for each gas. I mean, how did someone discover that? Who just looks into space through a prism and spends enough time doing it to see patterns.

In Wyoming, it's dark with no light pollution. With a little bit of knowledge and a good telescope...Its fun to star gaze.

There is a spectrophotometer downstairs . It's a P-E Model 552, UV-VIS NIR instrument.
It's the only one in the neighborhood ;-)
 

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Only a very small percentage of all the life forms that have existed on earth are alive today.
 

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No matter which direction one points a telescope, One always looks BACK in time. Objects and events seen are from a previous moment. And the objects themselves may not even exist at this moment.
 

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Electricity does not travel in wires, it travels in waves outside of them. The actual flow of electrons inside the conductor is very slow.

Quote:

“…, electrical energy does not travel though the wire as sound travels through air but instead always travels in the space outside of the wires. This is because electric energy is composed of electric and magnetic fields which are created by the moving electrons, but which exist in the space surrounding the wires.”
 

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The light emitted by a firefly (pale green) is nearly a match to the human photopic light sensitivity response curve..
 

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Jstpssng

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Electricity does not travel in wires, it travels in waves outside of them. The actual flow of electrons inside the conductor is very slow.

Quote:

“…, electrical energy does not travel though the wire as sound travels through air but instead always travels in the space outside of the wires. This is because electric energy is composed of electric and magnetic fields which are created by the moving electrons, but which exist in the space surrounding the wires.”
No matter which direction one points a telescope, One always looks BACK in time. Objects and events seen are from a previous moment. And the objects themselves may not even exist at this moment.
Good thread, when stuff like this gets posted! 👍
 

Alan W.

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When I worked at a printing company one of the mags we ran was Astronomy. Always found it fascinating but way too much light pollution here to see much.
 

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LD1

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Astronomy turned out to be my favorite class in college, I took it because I needed a science elective. The universe is fascinating and shows just how insignificant we are on planet earth. It made the little light go off in my head and brought together all the stuff I learned in college. So glad I took it in my final semester of under grad classes.

I was amazed that if light from space travels through a prism, it gives little black lines signifying different types of gasses. These lines never change for each gas. I mean, how did someone discover that? Who just looks into space through a prism and spends enough time doing it to see patterns.

In Wyoming, it's dark with no light pollution. With a little bit of knowledge and a good telescope...Its fun to star gaze.

Astronomy is one of my favorite topics. I really enjoy watching quite a few of the shows on science channel like how the universe works, through the worm hole, the planets and beyond, etc etc.

You are right about how inconsequentially small we are on this tiny planet. And the fact that all the starts in the sky we see are just from our own galaxy. And the fact that there are 100's of billions of other galaxies out there is mind boggling.

But as infinitely large as the universe is... equally mindboggling is how small things are.

And when you think in terms of what is "known" to science.........there is far more that we dont know than we do.

I dont want to dive down the rabbit hole of black holes, dark matter, parallel universes/realities, etc etc. But I will just say it truly is impressive how small we are and how little we actually know
 

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I am always amazed by quantum physics.
How else can something be in two places at the same time?
And quantum entanglement can happen across large distances!
 

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To the nice person that said a bit earlier....
> But as infinitely large as the universe is... equally mindboggling is how small things are.

Yes it is mind boggling is how small things are but the universe is not infinitely large. It is finite in both spacial and temporal extent :)

Mike
 

ovrszd

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Astronomy is one of my favorite topics. I really enjoy watching quite a few of the shows on science channel like how the universe works, through the worm hole, the planets and beyond, etc etc.

You are right about how inconsequentially small we are on this tiny planet. And the fact that all the starts in the sky we see are just from our own galaxy. And the fact that there are 100's of billions of other galaxies out there is mind boggling.

But as infinitely large as the universe is... equally mindboggling is how small things are.

And when you think in terms of what is "known" to science.........there is far more that we dont know than we do.

I dont want to dive down the rabbit hole of black holes, dark matter, parallel universes/realities, etc etc. But I will just say it truly is impressive how small we are and how little we actually know
I truly believe we are a tiny micro spot in space that is completely insignificant to the other tiny micro spots in the universe.
 

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A comment down in the "What would aliens look like" thread led me down a rabbit hole, reading about Nellie Bly. If you enjoy reading about history, this is a good article. Nellie Bly: Around the World
 

MossRoad

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I truly believe we are a tiny micro spot in space that is completely insignificant to the other tiny micro spots in the universe.
This book got me thinking as a kid to always look a bit closer at things...

B52195E6-5B2C-4A07-943F-B6E93E19632B.jpeg
 

LD1

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To the nice person that said a bit earlier....
> But as infinitely large as the universe is... equally mindboggling is how small things are.

Yes it is mind boggling is how small things are but the universe is not infinitely large. It is finite in both spacial and temporal extent :)

Mike
Goes to my earlier point about how little we actually know.

We have no idea whether the universe is finite or infinite
 

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To the best of my knowledge , there are 3 ways to tie one of the most useful knots , ( Clove Hitch ) and those can be tied blind folded . So when star gazing it will be dark so practice then if not familiar with that knot .
 

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Electricity does not travel in wires, it travels in waves outside of them. The actual flow of electrons inside the conductor is very slow.

Quote:

“…, electrical energy does not travel though the wire as sound travels through air but instead always travels in the space outside of the wires. This is because electric energy is composed of electric and magnetic fields which are created by the moving electrons, but which exist in the space surrounding the wires.”

Mmm…that is true… for AC currents. Not so much DC.
 

CobyRupert

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Facts about 1/60th (sexagesimal systems):

Did you know until the 18th century, 1/60th of a second was called a "tierce" or "third"?

The reason we use angles like 30, 45, 60, 90 degrees, based on circles and globes being 360 degrees,
and why hours and minutes are divided into 60 parts,
and why coordinates are also divided up into 1/60th minutes and seconds.

… is because of the Babylonians. Actually it was passed down to them from the Sumerians who ( 5000 years ago!) had a base60 numeral (counting) system, unlike our base10 digits that we use.

60 is a “superior highly composite number”. It’s divisible by 1,2,3,4,5,6,…10,12,15,20,30,60. Thus having a base60 numbering system makes “dividing” things into 60 parts easier than 10 parts when dealing with fractions and rational numbers.

To think we’re still using the base60 accounting methods of Babylonian merchants to send satellites into space.

 
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MossRoad

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A watch can be used as a compass. If you point the hour hand at the sun, halfway between the hour hand and the 12 is South. Try it.


That only works in the northern hemisphere. ;)


In the southern hemisphere, you have to point the 12 at the sun. The line halfway between the 12 and the hour hand point north.
 
 
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