1Venus
Venus could have had habitable conditions for billions of years. Long enough for life to have developed.
2. If you stand on Mercury, experiencing a day, from sunrise to sunrise, will take two full orbits around the sun, and three full rotations of the planet.
3. Scientists have discovered a Jupiter-like planet which they have name HAT-P-7b where it rains rubies and sapphires. It is located 1,000 light-years from Earth.
4. In 2006, astronomers spotted a huge cloud of fiery gas which is 3 million light-years in diameter and hotter than the center of our Sun. The gas ball contains more matter than a 1,000 billion Suns.
5. The Milky Way Galaxy is located in the largest empty void in the observable universe, which is a good thing because interesting cosmic activity seems to be completely incompatible with life. Maybe it’s not even a coincidence that a Supervoid evolved intelligent life able to map the Universe.
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6Io
Jupiter's moon Io, the most volcanically active world in the Solar System, has volcanic eruptions so powerful that they can be seen with large telescopes on Earth.
7. "Pan" the second moon of Saturn, is irregularly shaped because it has accidentally captured some of Saturn's ring material.
8. While the dwarf planet beyond Pluto is officially named Eris, and its moon is Dysnomia, they are unofficially called Xena and Gabrielle.
9. Betelgeuse is a massive star 450 light-years away that may go supernova at any given moment and outshine the moon at night and be clearly visible during the day.
10. There is a star about 50 light-years from Earth in the constellation Centaurus (BPM 37093) that is comprised of pure crystallized carbon, which means it is a diamond that weighs 10 billion trillion trillion carats.
11Mneme
Jupiter has a moon named Mneme. With a mean diameter of 1 km, its elliptical orbit is opposite to Jupiter's rotation and takes 620 days to orbit around Jupiter. Mneme means "memory" and is named for one of the Muses, or daughters of Zeus
12. The dwarf planet Chiron in our solar system which orbits our sun between Saturn and Uranus has its own rings. The orbit of Chiron is highly eccentric, which makes scientists speculate it may have originated from outside our solar system.
13. Ganymede, the largest moon in our Solar System, is the only known moon that has a magnetic field.
14. Mercury is thought to be the almost-exposed core of a planet that was 4.5x bigger before a collision with another proto-planet that blew away most of its crust and mantle.
15. Our galaxy (the Milky Way) is part of a larger supercluster of 100,000 galaxies named Laniakea that stretches 500 million light-years across!
16Titan
In the future when our sun becomes a red giant, Saturn's moon Titan will become warm enough for life to possibly evolve in a manner similar to Earth. These conditions would persist for a hundred million years.
17. The coldest place recorded in our Solar System is Triton, a moon of Neptune, which has a temperature of -240C (-400F).
18. Saturn has a moon called Mimas. It is really peculiar in that it has a large crater in it that makes it look like the Death Star.
19. The average number of stars we can see with the naked eye is around 10,000. This number is only the 0.000004% of all stars in the Milky Way galaxy.
20. When a magnetar star named SGR 1806-20, which is on the other side of our galaxy, experienced a "star-quake", in one-tenth of a second, a flare was released which had more power than what our sun can produce in 150,000 years.
21Gomez's Hamburger
There is a nebula called Gomez's Hamburger that looks like a space burger. The buns are light reflecting off dust and the patty is a dark band of dust in the middle.
22. The moons of Saturn Janus, and Epimetheus change orbits once every 4 years. Due to gravitational interaction, the inner moon's momentum increases as the outer moon's momentum decreases.
23. Since the planet Neptune was first discovered in 1846 it has only orbited the Sun once, due to the fact its orbit is about 165 years.
24. The neutron star 'PSR J1748-2446ad' rotates on its axis 716 times per second and is the fastest spinning known neutron star. At its equator, it spins at 24 percent of the speed of light.
25. Callisto (one of Jupiter's moons) has about 99% the diameter of the planet Mercury, but only about a third of its mass.
