There’s a lot to wonder about space. We know Space is vast and beautiful, but we’re not really sure how vast. Some of the things we do know, however, are downright mind-boggling.
In our previous post we showed 5 amazing facts about space like flat universe and expanding galaxies. And after seeing the overwhelming response from our readers we decided to dig deep and found 8 facts about space that will truly rock your world! So the next time when you look up at the stars you can be ever more wowed by what you’re looking at.
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8 Facts About Space:
1. Neutron stars can spin at a rate of 600 rotations per second.
Neutron stars are one of the possible evolutionary end-points of high mass stars. They’re born in a core-collapse supernova star explosion and subsequently rotate extremely rapidly as a consequence of their physics. Neutron stars can rotate up to 60 times per second after born. Under special circumstances, this rate can increase to more than 600 times per second.
2. All of space is completely silent.
Sound waves need a medium to travel through. Since there is no atmosphere in space, space will always be eerily silent. You may be asking how astronauts can talk to each other in space. Lucky for them, radio waves can travel through space. No problem there, Houston.
3. There is an uncountable number of stars in the known universe.
We basically have no idea how many stars there are in the universe. Right now we use our estimate of how many stars there are in our own galaxy, the Milky Way. We then multiply that number by the best guesstimate of the number of galaxies in the universe. After all that math, NASA can only confidently say that say there all zillions of uncountable stars. A zillion is any uncountable amount.
An Australian National University study put their estimate at 70 sextillion. Put another way, that’s 70,000 million million million. This figure is basically a guess, though.
4. The footprints on the moon will stay there for at least 100 million years.
Since the moon doesn’t have an atmosphere, there’s no wind or water to erode or wash away the Apollo astronauts’ mark on the moon. That means their footprints, rover prints, spaceship prints, and discarded materials will stay preserved on the moon for a very long time.
They won’t stay on there forever, though. The moon still a dynamic environment. It’s actually being constantly bombarded with “micrometeorites,” which means that erosion is still happening on the moon, just very slowly.
Do you know: How Crazily Cold Neptune is!
5. 99% of our solar system’s mass is the sun.
Our star, the Sun, is so dense that it accounts for a whopping 99% of our entire solar system. That’s what it allows it to dominate it gravitationally. Technically, our Sun is a “G-type main-sequence star” which means that every second, it fuses approximately 600 million tons of hydrogen to helium. This means that it also converts about 4 million tons of matter to energy as a byproduct.
Being the type of star that the Sun is, it also means that when it dies, it will become a red giant and envelop the earth and everything on it. But don’t worry: That won’t happen for another 5 billion years.
6. More energy from the sun hits Earth every hour than the planet uses in a year.
You should be sad to know that solar technology produces less than one-tenth of 1% of global energy demand. This is due to several factors, including how much land is required for solar panels to capture enough energy for a population of people to use, how unreliable it is in bad weather and at night, and how expensive the technology is to install.
Despite all these drawbacks, the use of solar energy has increased at a rate of 20% each year for the past 15 years.
7. If same type of metal touch in space, they will bond and be permanently stuck together.
This amazing effect is called cold welding. It happens because the atoms of the individual pieces of metal have no way of knowing that they are different pieces of metal, so the lumps join together. This wouldn’t happen on earth because there is air and water separating the pieces. The effect has a lot of implication for spacecraft construction and the future of metal-based construction in vacuums.
8. The largest asteroid ever recorded is a mammoth piece of space rock named Ceres.
The asteroid is almost 600 miles in diameter. It’s by far the largest in the asteroid belt and accounts for a whole third of the belt’s mass. The surface area is approximately equal to the land area of India or Argentina. It’s so big, there’s actually some debate over whether to refer to it as a dwarf planet instead of an asteroid, even if it has mostly asteroid-like qualities.
Ceres piques our interest specifically, as water in the form of ice has been spotted on its surface. An unmanned spacecraft named Dawn is due to be orbiting the space rock by 2015.
Flat Universe? Expanding Galaxies? Check out our original article about 5 Amazing Facts about Space!