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GM VFDC Space is amazing.

The sheer vastness of it, along with the trillions upon trillions of objects in the many billion galaxies of the universe is almost incomprehensible to the human brain.

Jupiter's famous Red Spot has been shrinking over the past few decades. This spot on the planet is a giant spinning stor...
05/12/2021

Jupiter's famous Red Spot has been shrinking over the past few decades. This spot on the planet is a giant spinning storm that used to be able to fit about three Earths. Now, according to only one Earth can fit inside the spot.

Interestingly enough, as the storm is shrinking in width, it's actually growing taller in length. As of 2018, scientists are still stumped as to why this phenomenon is occurring in the first place, but some theorize that it may have to do with jet streams on Jupiter that have either changed direction or location.

Venus has an extremely slow axis rotation that takes about 243 Earth days to complete one full cycle. Funny enough, it t...
05/12/2021

Venus has an extremely slow axis rotation that takes about 243 Earth days to complete one full cycle. Funny enough, it takes Venus even less time in Earth days in order to complete one revolution around the sun -- 226 to be exact.

Furthermore, the sun rises every 117 Earth days, which means that the sun will rise only two times during each year, which is also all technically in the same day. Since Venus also rotates clockwise, the sun will rise in the west and set in the east.

The asteroid -- which is sometimes known as a dwarf planet -- is almost 600 miles in diameter. It's by far the largest i...
05/12/2021

The asteroid -- which is sometimes known as a dwarf planet -- is almost 600 miles in diameter. It's by far the largest in the Asteroid Belt between Mars and Jupiter and accounts for a whole third of the belt's mass. Ceres' surface area is approximately equal to the land area of India or Argentina

This amazing effect is called cold welding. It happens because the atoms of the individual pieces of metal have no way o...
05/12/2021

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.

The use of solar energy has increased at a rate of 20 percent each year for the past 15 years. According to Yale Environ...
05/12/2021

The use of solar energy has increased at a rate of 20 percent each year for the past 15 years. According to Yale Environment 360, the world added 30 percent more solar energy capacity in 2017, meaning that 98.9 gigawatts of solar energy was produced that year.

Despite seemingly large number, this amount of energy only accounts for 0.7 percent of the world's annual electricity usage.

Source: Yale Environment 360

Our star, the sun, is so dense that it accounts for a whopping 99 percent of the mass of our entire solar system. That's...
22/11/2021

Our star, the sun, is so dense that it accounts for a whopping 99 percent of the mass of our entire solar system. That's what allows it to dominate all of the planets 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. It also converts about 4 million tons of matter to energy as a byproduct.

When the sun 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.

Since the moon doesn't have an atmosphere, there's no wind or water to erode or wash away the Apollo astronauts' mark on...
22/11/2021

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, roverprints, 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.

We basically have no idea how many stars there are in the universe. Right now we use our estimate of how many stars ther...
22/11/2021

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.

Sound waves need a medium to travel through. Since there is no atmosphere in the vacuum of space, the realm between star...
22/11/2021

Sound waves need a medium to travel through. Since there is no atmosphere in the vacuum of space, the realm between stars will always be eerily silent.

That said, worlds with atmospheres and air pressure do allow sound to travel, hence why there's plenty of noise on Earth and likely other planets as well.

Neutron stars are one of the possible evolutionary end-points of high mass stars. They're born in a core-collapse supern...
22/11/2021

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.

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