- There are thousands of other planets out there.
We have eight planets in our Solar System. However, outside of our Solar System there are thousands of other planets. The extra-solar planets or exo-planets are in orbit around another star. So far we have almost 1800 confirmed new worlds, with another 3000 awaiting confirmation. Astronomers are looking to a star’s goldilocks zone for planets that may be habitable, just like the Earth. The majority of planets discovered so far are hot gas giant planets.
2. In space the skin on your feet peels off!
This is a pretty gross fact but in the micro-gravity environment, astronauts are not using their feet to walk. Therefore the skin on their feet starts to soften and flakes off. As laundry facilities do not exist in space, astronauts will wear the same underwear and socks for a few days. Those socks then need to be taken off very gently. If not those dead skin cells will float around in the weightless environment.
3. One million Earths can fit inside the Sun.
Ancient astronomers once believed the Earth was at the centre of the Universe but now we know that the Sun is at the centre of our Solar System and our planets orbit the Sun. The Sun makes up 99.8% of the entire mass of the whole Solar System. One million Earths would be needed to be the same size as the Sun.
4. You become taller in Space.
Another change to the human body in micro-gravity is that spine straightens out, as gravity is not pushing you down. In fact you can be up to as much as 5cm taller in the Space Station.
5. Space is not that far away.
Space officially begins at the universal marker of the Karman Line. This invisible boundary is 100 km above the Earth. In theory if you could drive your car upwards, you could be in space in less than hour.
6. The hottest planet is not the closest planet to the Sun.
Even though Mercury is the closest planet to the Sun, it is not actually the hottest. Mercury does not have any atmosphere meaning that this planet is only hot in the daytime when it is directly facing the Sun. At this stage temperatures can rise to 425°C but at night the planet’s temperature can drop down to a freezing -180°C. Venus is the hottest planet. Its thick clouds trap the Sun’s heat causing Venus to be a sizzling 500°C all of the time!
7. Dirty underwear and toilet paper has helped grown plants on the ISS
American astronaut Don Pettit discovered that by folding a pair of underpants into a sphere shape and stitching in some Russian toilet paper (which is thick, wool like gauze), this created a warmer environment for some tomato and basil seeds to start to sprout. Like their socks, underwear is only changed every 3-4 days so he figured the pants might provide some extra nutrients for the plants!
8. In space metal sticks together
In a vacuum like space, when two pieces of metal touch each other they bond together. This is a process called cold welding. On the Earth because of the oxygen in our environment this does not happen naturally but it is used during some manufacturing processes. It is something to take into account but it is not usually a problem as the astronaut’s tools maintain an oxide layer even when leaving Earth.
