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Top 10 Cool Facts about Space

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posted on Apr, 5 2010 @ 12:06 AM
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There is still so little known about outer space by modern science, but of that little we do know, there are some extraordinarily amazing things. This is a list of the top 10 cool facts about Space.


I think its safe to point out the word "fact" is used loosely here since some of these tid-bits aren't agreed upon by all scientist.

10. Lightweight


Fact: If you put Saturn in water it would float
The density of Saturn is so low that if you were to put it in a giant glass of water it would float. The actual density of Saturn is 0.687 g/cm3 while the density of water is 0.998 g/cm3. At the equator Saturn has a radius of 60,268 ± 4 km – which means you would need an extremely large glass of water to test this out.


I never knew Saturn had such a low density

9. Constantly Moving


Fact: We are moving through space at the rate of 530km a second
Our Galaxy – the Milky Way is spinning at a rate of 225 kilometers per second. In addition, the galaxy is traveling through space at the rate of 305 kilometers per second. This means that we are traveling at a total speed of 530 kilometers (330 miles) per second. That means that in one minute you are about 19 thousand kilometers away from where you were. Scientists do not all agree on the speed with which the Milky Way is traveling – estimates range from 130 – 1,000 km/s. It should be said that Einstein’s theory of relativity, the velocity of any object through space is not meaningful.


330mph is actually a bit slower then i expected us to be going, I'm guessing this is why not all scientist agree on this (yes because of my opinion
/sarcasm)

8. Farewell old friend!


Fact: The moon is drifting away from Earth
Every year the moon moves about 3.8cm further away from the Earth. This is caused by tidal effects. Consequently, the earth is slowing in rotation by about 0.002 seconds per day per century. Scientists do not know how the moon was created, but the generally accepted theory suggests that a large Mars sized object hit the earth causing the Moon to splinter off.


I wonder how amazing the moon looked from earth a couple million years ago.

7. Ancient Light


Fact: The light hitting the earth right now is 30 thousand years old
The energy in the sunlight we see today started out in the core of the Sun 30,000 years ago – it spent most of this time passing through the dense atoms that make the sun and just 8 minutes to reach us once it had left the Sun! The temperature at the core of the sun is 13,600,000 kelvins. All of the energy produced by fusion in the core must travel through many successive layers to the solar photosphere before it escapes into space as sunlight or kinetic energy of particles.


I knew it took 8minutes to reach the earth from the surface of the sun, but i had no idea it took the energy 30,000 years to move from the core to the surface, thats incredible, i can't help but wonder how they went about figuring this out.

6. Solar Diet


Fact: The Sun loses up to a billion kilograms a second due to solar winds
Solar winds are charged particles that are ejected from the upper surface of the sun due to the high temperature of the corona and the high kinetic energy particles gain through a process that is not well understood at this time. Also, did you know that 1 pinhead of the sun’s energy is enough to kill a person at a distance of 160 kilometers


That's a lot of weight, wish I could loose some


5. The Big Dipper is not a constellation


Fact: The Big Dipper is not a constellation, it is an asterism
Many people consider the big dipper to be a constellation but, in fact, it is an asterism. An asterism is a pattern of stars in the sky which is not one of the official 88 constellations; they are also composed of stars which are not physically related to each other and can be vast distances apart. An asterism can be composed of stars from one or more constellations – in the case of the Big Dipper, it is composed entirely of the seven brightest stars in the Ursa Major (Great Bear) constellation.


I have a tattoo of the big dipper on my inner bicep, and I've always said "I have the big dipper constellation tattooed on me" boy do i feel foolish now.


4. George’s Star


Fact: Uranus was originally called George’s Star When Sir William Herschel discovered Uranus in 1781, he was given the honor of naming it. He chose to name it Georgium Sidus (George’s Star) after his new patron, King George III (Mad King George). This is what he said:
In the fabulous ages of ancient times the appellations of Mercury, Venus, Mars, Jupiter and Saturn were given to the Planets, as being the names of their principal heroes and divinities. In the present more philosophical era it would hardly be allowable to have recourse to the same method and call it Juno, Pallas, Apollo or Minerva, for a name to our new heavenly body. The first consideration of any particular event, or remarkable incident, seems to be its chronology: if in any future age it should be asked, when this last-found Planet was discovered? It would be a very satisfactory answer to say, ‘In the reign of King George the Third.
Uranus was also the first planet to be discovered with the use of a telescope.


I dunno, I sort of think Georges Star was a better name then Uranus

3. Extra Moons


Fact: Earth has at least 4 moons
Okay – that is not actually true – but it is very close. In 1986, Duncan Waldron discovered a asteroid (5km across) that is in an elliptic orbit around the sun with a period of revolution virtually identical to that of Earth. For this reason the planetoid and earth appear to be following each other. The periodic planetoid is named Cruithne (pronounced krin-yə) after an ancient group of Scottish people (also known as the Picts). Because of its unusual relationship with Earth, it is sometimes referred to as Earth’s second moon. Cruithne, is fainter than Pluto and would require at least a 12.5 inch reflecting telescope to attempt to be seen. Since its discovery, at least three other similar asteroids have been discovered. These types of objects are also found in similar relationships to other planets in our Solar System. In the image above (courtesy of Paul Wiegert), the earth is the blue circle with a cross in it, and Cruithne’s orbit is shown in yellow.

Source

This is completely new to me, even tho the "fact" title is a little misleading I still find it interesting that there are small body's out there that orbit in this manner.


Continued...




posted on Apr, 5 2010 @ 12:06 AM
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2. Sunspot Music


Fact: Sunspot activity may be the primary reason for the beautiful sound of Stradivarius violins
Antonio Stradivari is considered to be the greatest violin maker ever. He lived in Italy in the 17th and 18th centuries. Scientists have been unable to work out what it is about his violins that makes them so incredible, but they do know that the timber used to make them is a very important contributing factor. From the 1500s to 1800s, the earth underwent a little ice age mostly due to increased volcanic activity and decreased solar activity (this is called the Maunder Minimum). As a result of this cooling, the types of trees that Stradivari used for his violins were particularly hard (due to slow growth). Hard timber is especially good when making violins. It is very probable that had Stradivari lived in a different age, his violins would not be prized as they are today. This picture above is made of three overlapping photos. It shows the rings in the spruce tree used to make the most famous Stradivarius violin, the “Messiah.” The first row of numbers gives the width of each ring in millimeters (one mm is about the thickness of a fingernail). The bottom row gives the years in which each ring grew.


This seems more like an earth fact then a space fact....

1. Cold Welding


Fact: If two pieces of metal touch in space, they become permanently stuck together
This may sound unbelievable, but it is true. Two pieces of metal without any coating on them will form in to one piece in the vacuum of space. This doesn’t happen on earth because the atmosphere puts a layer of oxidized material between the surfaces. This might seem like it would be a big problem on the space station but as most tools used there have come from earth, they are already coated with material. In fact, the only evidence of this seen so far has been in experiments designed to provoke the reaction. This process is called cold welding.

Source

Now thats neat, To bad anything from earth seems to already have the oxidation that keeps this from happening, I think space stations might come together a little easier if they just stuck together like that.

Hope everyone enjoyed this list as much as I did



posted on Apr, 5 2010 @ 12:12 AM
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I enjoyed it very much, thank you. That was put together very well.

cold welding huh? never heard of that before, i would like to see nasa do that on film for us.



posted on Apr, 5 2010 @ 12:15 AM
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If two pieces of metal touch in space, they become permanently stuck together


This is the reason
that molybdenum disulfide,
also known as graphite a by product
of copper mining, is indispensable to space tech.


David Grouchy



[edit on 5-4-2010 by davidgrouchy]



posted on Apr, 5 2010 @ 01:35 AM
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The extra moons and cold welding was very cool;
i had no idea there was a planetoid following earth;
i hope it doest crash into us

more info on earth's 2nd moon


[edit on 5-4-2010 by DjSharperimage]



posted on Apr, 5 2010 @ 01:49 AM
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Awesome thread. I love little facts like this and wish we could get a thread a day like this instead of the infinite haarp and earthquake threads we currently see. Great job OP.



posted on Apr, 5 2010 @ 01:54 AM
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Awesome stuff. Thanks for sharing S&F.

And this is only a nats hair of the amazing facts about space!!

The mind boggles...........



posted on Apr, 5 2010 @ 02:54 AM
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Originally posted by Alaskan Man


Fact: The moon is drifting away from Earth
Every year the moon moves about 3.8cm further away from the Earth.


And here was I thinking that I was needing glasses ;-)

Great post Alaskan Man - Informative as well as entertaining


[edit on 5-4-2010 by mckyle]



posted on Apr, 5 2010 @ 03:22 AM
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reply to post by Alaskan Man
 

Consequently, the earth is slowing in rotation by about 0.002 seconds per day per century.

Is this per day or per century.?



posted on Apr, 5 2010 @ 04:06 AM
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I didn't know about the Asteroid that's following us. I wonder why it hasn't caught up to us and Crashed?

I knew about the Cold Welding though. When I found out about it, I was amazed that something like that can happen. I wonder how you could Mimmick the process, here on Earth?

Great thread. I wish there was more like 'em..

You enlightened my day.. Thankyou..



posted on Apr, 5 2010 @ 04:42 AM
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This means that we are traveling at a total speed of 530 kilometers (330 miles) per second. That means that in one minute you are about 19 thousand kilometers away from where you were. Scientists do not all agree on the speed with which the Milky Way is traveling – estimates range from 130 – 1,000 km/s. It should be said that Einstein’s theory of relativity, the velocity of any object through space is not meaningful.


330mph is actually a bit slower then i expected us to be going, I'm guessing this is why not all scientist agree on this (yes because of my opinion /sarcasm)


It is 330 miles per SECOND, or 118800 mph



posted on Apr, 5 2010 @ 04:43 AM
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Number 2 on your list reminds me of the universe song or whatever its called from Monty Pythons Meaning of Life. Awesome movie and song. I was actually feeling a bit down and that song cheered me right up! Try it sometime I`m sure the clip must be somewhere on youtube. But save it for when you need a little cheering up. Well I guess we could all use it at this point... But I do think it would be better to watch the whole movie. In fact, watch all the monty python movies! Just don`t watch "the full monty"... that wont cheer you up one bit.


 
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posted on Apr, 5 2010 @ 06:50 AM
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thanks, heard of cold welding but guess i never really thought about it. very interesting stuff



posted on Apr, 5 2010 @ 07:31 AM
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Really good post, well done, one thing I puzzle over, sunlight come from the middle of the sun, right? so why are sunspots black?



posted on Apr, 5 2010 @ 07:35 AM
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Thanks for the list, was a fun read.


*edit* got beat to it


[edit on 5-4-2010 by Pimpish]



posted on Apr, 5 2010 @ 08:37 AM
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Nice finds, OP.
So you have this dipper "constellation tatooed on you, huh ? pfew, you know, some people have Che Guevara tatooed on them and yet they don't know how many people he murdered in cold blood.

I didn't know about the 2d Moon, thanks for the tip, I'll try to look into it this afternoon.

S and F for you, so we get rid of those Earthquake threads



posted on Apr, 5 2010 @ 08:41 AM
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This means that we are traveling at a total speed of 530 kilometers (330 miles) per second. That means that in one minute you are about 19 thousand kilometers away from where you were. Scientists do not all agree on the speed with which the Milky Way is traveling – estimates range from 130 – 1,000 km/s. It should be said that Einstein’s theory of relativity, the velocity of any object through space is not meaningful.


530 kilometers per second
X 60 seconds
= 31,800 Kilometers

Not 19,000? did i do the math wrong or what?


Great thread S+F!



posted on Apr, 5 2010 @ 08:57 AM
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I don't see what #2 has to do with space, or even with sunspots, but these are all really cool. Especially cold welding - I had no idea. That is freaking COOL.



posted on Apr, 5 2010 @ 09:12 AM
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Originally posted by Gimpychaos

This means that we are traveling at a total speed of 530 kilometers (330 miles) per second. That means that in one minute you are about 19 thousand kilometers away from where you were. Scientists do not all agree on the speed with which the Milky Way is traveling – estimates range from 130 – 1,000 km/s. It should be said that Einstein’s theory of relativity, the velocity of any object through space is not meaningful.


530 kilometers per second
X 60 seconds
= 31,800 Kilometers

Not 19,000? did i do the math wrong or what?


Great thread S+F!


I think he meant miles, you do the maths on that and you'll see that it's around 19 thousand miles per minute

[edit on 5-4-2010 by Kamrad]



posted on Apr, 5 2010 @ 09:53 AM
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Originally posted by acrux
reply to post by Alaskan Man
 

Consequently, the earth is slowing in rotation by about 0.002 seconds per day per century.

Is this per day or per century.?



when dealing with units of measurement for accelleration (or decelleration), there is always two time components:

distance per second -- Rate of Travel (speed)
distance per second per second -- speed increase or decrease over time.



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