The largest galaxy in the observable universe is an elliptical galaxy, IC 1101. It has 100 trillion stars and is 6 million light years across. By comparison, the Milky Way has a mere 100 billion stars and is 120 000 light years across.
Graham´s number is a number so large that the observable universe is far too small to contain an ordinary digital representation of Graham´s number, assuming that each digit occupies one Planck volume (smallest meaningful measurement).
The Oh-My-God particle was an ultra-high-energy cosmic ray that was detected on 15 October 1991 by the University of Utah. It was travelling so absurdly fast that time dilation dictates that it would have experienced only 16 days of time since the beginning of the universe.
A “Googolplex” is such a large number, that if you were to write a “1”, followed by a “0” on every single hydrogen particle in the known universe, you would not even get close to writing out the full number.
Mira, a dying star zipping through our universe is shedding its matter, each bit of which may one day grow into a new, individual star of its own. NASA has called it “The Johnny Appleseed of The Universe.
Uranium-238 has a half-life of 4,468 billion years or about 1/3 the estimated age of the universe.
A dwarf galaxy named Segue 2 is the least massive galaxy in the known Universe, located 114 000 light-years away. The galaxy consists of just 1 000 or so stars with a bit of dark matter holding them together.
A star discovered 75 light-years away is no warmer than a freshly brewed cup of coffee.
It is theorized that there may hypothetical objects that behave just the opposite of a black hole called a white hole. They cannot be entered from the outside, but matter and light can escape.
In 1977, we received a signal from deep space that lasted 72 seconds. We still don´t know how or where it came from.
According to the string theory, black holes have the potential to be shaped like rings, helices, or even like the planet Saturn, but no one actually knows their true shape.
The Milky Way, Andromeda, and all the nearby galaxies are being pulled into something that we can´t see that is tens of thousands of times more massive than our galaxy, called The Great Attractor.
Astronomers have found a massive water vapor cloud which holds 140 trillion times the mass of water in the Earth´s oceans somewhere around 10 billion light years away. It is the largest discovery of water ever found.
Some multiple stars have planets, and they orbit some of the stars while being well away from others.
In the Solar System, iron is more abundant than any other element heavier than silicon, and is about as abundant as silicon itself. This from some iron nuclides being the most tightly bound of any nuclide.
Hydrogen, helium, lithium, and beryllium were made in the early universe. All the others were made in the cores of stars and then spewed out.
Some planets orbit pairs of close stars, thus making them “Tatooine planets”.
Dark energy has made our universe´s expansion start to accelerate again after decelerating.
The Milky Way galaxy alone is thought to harbor some 100 million stellar-mass black holes, plus supermassive Sagittarius A* at its heart.
The are behind Neptune is called the Kuiper belt. It is a disc shaped region of comets, asteroids and dwarf planets, including Pluto. There are estimated thousands of bodies larger than 100 km and trillions of comets. Even the big bodies are not typical asteroids, but frozen liquids and gasses sucha as methane, ammonia and water.
There´s a 30 000 kilometer hexagonal cloud at Saturn´s north pole.
Venus is the most extreme, dangerous planet in the Solar System.
In the darkest parts of space, temperatures can reach -270 degrees Celsius. But if you´re orbiting near Earth in the sunlight, temperature reaches 121 degrees Celsius. Astronauts’ spacesuits are white to reflect he heat they encounter while floating above the Earth.
More energy from the sun hits Earth every hour than the planet uses in a year.
The Saturn has seven distinct rings. It is unknown why these are so prominent, but it is believed that it has something to do with the large number of moons that orbit Saturn. The rings have a radius of about 250 000 km.
The Voyager 1 spacecraft is the most distant human-made object from Earth.
Pluto is not the only dwarf planet in our system. Besides Pluto there are four other dwarf planets in our system: Ceres, Haumea, Makemake and Eris.
It takes 230 million years for our sun to complete cycle of orbit around its massive black hole located at the centre of our galaxy.
Gliese 436 B is a planet located 33 light years from Earth orbiting a red dwarf star Gliese 436. The interesting thing is that even after having a very high surface temperature about 526°C it have water in the form of ice.
There would be no Sun after 4,5 billions years. Our sun will ultimately stop fusion and will become a white dwarf star and cool down and will get lost in the vastness of space.
Research by Yale University scientists suggests that a rocky planet called 55 Cancri which has a radius twice Earth´s and a mass eight times greater may have a surface made up of graphite and diamond.
The universe is made up of mostly things that cannot be seen. In fact, the stars, planets and galaxies that can be detected make up only 4 percent of the universe, according to astronomers. The other 96 percent is made up of substances that cannot be seen or easily comprehended.
100 billion neutrinos are passing through your thumbnail every second. 8,5 minutes ago they were in the heart of the Sun.
Comets are leftovers from the creation of our solar system about 4,5 billion years ago – they consist of dust, ice and carbon dioxide.
On Saturn´s moon Titan, the gravity is low enough and the atmosphere thick enough, that by attaching small wings to your arms, you could fly like a bird.
Astronauts can see cosmic lighting when they close their eyes in space.
If you unravelled all of the DNA in your body, it would span 34 billion miles, reaching to Pluto (2,66 billion miles away) and back … six times.
When a television is not tuned to a station you can see the black and white fuzz and clacking white noise, around 1% of this interference is made up cosmic background radiation – the afterglow of creation.
The universe began with the Big Bang, and is estimated to be approximately 13.7 billion years old (plus or minus 130 million years).
It has benn discovered 82 moons of Saturn so far.
The core of Mercury makes up 80% of the planet.
There are anywhere between 200-400 billion stars in the Milky Way and an estimated 100 billion planets. Around one in five stars are like our sun, and astronomers have estimated that about 22% of them have planets the size of Earth in their habitable zone, where water can exist as a liquid. This means there could be 8.8 billion planets within the galaxy capable of supporting life (not accounting for composition of the planet or its atmosphere).
Voyager 1 also discovered winds that blow at more than 500 m/sec (1,100 mph) through Saturn’s atmosphere in an easterly direction.
The strongest metal of this universe are found inside of neutron star and it’s called “neutron pasta”, it is 10 billion times stronger than steel.
Milky way galaxy is 679943238338.4635x bigger than the sun.
Virgo supercluster (our milky way belongs to it) is about 1100x times bigger than our milky way galaxy.
Astronauts on the International Space Station witness around 15 sunrises and 15 sunsets every day.
The only moon to have its own atmosphere is TITAN, one of Saturn’s moon. Also, the second biggest moon in our solar system. Biggest moon is GANYMEDE, Jupiter’s moon. Ganymede hats it’s own magnetic field, the only moon to have one.
The distance to Galactic Centre is measured as 27000 light years.
Neutron stars are the fastest rotating massive bodies in our universe. They rotational speeds are mind blowing . The fastest rotating pulsar is located in the constellation Sagittarius named as psr j1748 244ad. At its equater it is spinning at about 25% of speed of light completing 700 rotation about its own axis .
Space suit has a mass of 47 pounds (21 kg) without a life support backpack, and costs only a fraction of the standard US$12,000,000 cost for a flight-rated NASA space suit.
The earliest recorded comet is the HALLEY COMET, which was first observed in ancient china in 240 B. C. It makes one orbit around the Sun every 75 years.
When a massive star explodes, its scrunched up core forms something called a neutron star.
Gluons are responsible for most of the mass ofatter around us as 99% of mass of an atom comes from interaction of quarks of proton ane neutron with the gluons.
The closet black hole, Cygnus X – 1, is 8,000 light years away.
On 19th November 2017, scientists discovered a cigar-shaped asteroid coming from out of the solar system. It passed by Earth at a speed of 26.33 km/s (94,800 km/h) and leaving the solar system in 35 days.
In 5 billion years Sun will expand and engulf the entire orbit of Mercury , Venus and Earth . Earth will be a charred ember, descending down into cosmic crucibles , that is the sun’s core, as we vaporize to our death.
Quasars are comparitively small but emit light equivalent to 3–4 galaxies combined.
On 14 September 2015, gravitational waves were detected on Earth for the first time. These ripples in the fabric of space-time – predicted by Einstein in 1916 – came from the merger of two black holes in a distant galaxy.
Light from some stars takes so long to travel to our eyes that when you look at the star-speckled night sky you’re actually peering deep into the past.
TYC 8998-760-1, however, is like our sun. It resembles a very  young version of our own sun.
One of Saturn’s moons has a distinct two-tone coloration.
The human brain is the most complex object in the known Universe.
Uranus’s moon Miranda is the weirdest moon of all. It seems to have been blasted apart, and then put together again.
The Earth is tiny in comparison with the rest of the universe – it could fit into the sun 1.3 million times.
The Sun makes a full rotation once every 25 – 35 days.
In 2006, Pluto was reclassified as a dwarf planet after 76 years classified as the outermost plant in our solar system since its discovery in 1930.
The shape of the universe is infuenced by the struggle between the pull of gravity (based on the density of the matter in the universe) and the rate of expansion.
There are super-compact planetary systems in which all planets orbit closer to their parent star than Mercury, the innermost planet of the Solar System, does to the Sun.
In the Milky Way alone there are estimated to be 500 million potential Goldilocks planets (planets which fall into a star’s habitable zone), so if life can exist in places other than Earth there is a huge number of potential planets on which it might thrive.
There is no such thing as the Universe´s center.
The Martian day is 24 hours 39 minutes and 35 seconds long.
If the Earth had rings like Saturn, they would be positioned along the equator.
Jupiter´s clouds are made of ammonia and ammonium hydrosulfide.
Halleys Comet won’t orbit past Earth again until 2061.
One of Saturn´s moons is walnut-shaped because it´s absorbed some of Saturn´s rings.
The Moon is shaped like a lemon, with flattened poles and bulges on both the near and far side around its equator. This strange shape is thought to have been created during interactions with Earth soon after its formation.
Uranus is tilted on its side.
If Jupiter´s magnetic field were visible to the naked eye, it would appear about four times as wide as the full Moon.
The entire atmosphere of Venus circulates around quickly, with winds reaching speeds of up to 85 m/s (300 km/h; 186.4 mph) at the cloud tops, which circle the planet every four to five Earth days.
Neptune radiates more heat than it gets from the sun.
Most comets are spotted with a sun-gazing telescope.
If your spacesuit started leaking, you could survive for a couple of minutes.
Pluto’s observed atmosphere broke all the predictions. Scientists saw the haze extending as high as 1,000 miles (1,600 km), rising higher above the surface than the atmosphere on Earth.
Scientists found about 20 layers in Pluto’s atmosphere that are both cooler and more compact than expected. This affects calculations for how quickly Pluto loses its nitrogen-rich atmosphere to space.
As regions of space are whizzing away from one another at an ever-increasing rate, the first population of stars to form in the Universe are now too far away for us to ever hope of spying them.
Jupiter’s moon Io has towering volcanic eruptions.
Not all planets form and stay around stars: astronomers estimate that there could be more than 200 billion of them floating free and drifting through our Galaxy.
Over half of the Sun-like stars in the Milky Way are part of multiple star systems, binaries or triplets, with stars orbiting around a common centre of mass.
Saturn’s northern hemisphere has a raging six-sided storm nicknamed “the hexagon.” Why exactly it’s that shape is a mystery. But what is known is that this hexagon, which shares several features in common with hurricanes, has been there for at least decades ― if not hundreds of years.
Sound waves generate heat when they travel and are absorbed by materials.
The sun doesn’t change color during sunset. We only see it that way because the sun’s wavelengths react with the difference in the atmosphere.
If Betelgeuse exploded into a supernova, it would light our sky for 2 months straight.
Wind can cast shadows, they´re just not visible to the naked eye and need to be processed via machine.
If you put Saturn in the water, it would swim.
The Eiffel Tower is a few centimetres taller in summer than winter.
The universe is not completely a vacuum. On average, there are 0.3 atoms per cubic meter.
Only 5 % of the universe is composed of matter. 27% is dark matter and 68 % is hidden energy.
Neutron stars are so dense that a teaspoon weighs more than all people on Earth.
The sun is 400 times bigger that the moon but also 400 times further, so they look similar in the sky.
You can yell at your soup to warm it. However, sound waves carry minimal energy, so the effect would not be noticeable.
Saturn´s moon Titan has liquid oceans of natural gas.
The full moon is 9 times brighter than a crescent moon.
Every year, the Moon moves 3,8 centimeters away from the Earth.
There are “wandering planets” that just roam the universe. They are not tied to any star.
The nearest black hole is 1 500 light-years form Earth.
The largest structure discovered in the universe sis the so-called Ursa Major Supercluster. A large cluster of galaxies with the size of 200,000,000 light-years.
Every 4 months, a new star is born in our galaxy.
Even if you were to approach the speed of light (300,000 km/s; 186,000 miles/s), it would still take you 100,000 years to cross the entire Milky Way.
Water can work against gravity, moving up narrow tubes in a process called capillary action.
There are 79 known moons of Jupiter.
A day on the planet Mercury is twice as long as its year.
It takes 165 years for Neptune to orbit the Sun. It only recently completed the first circulation since its discovery in 1846.
Mercury has extreme temperature fluctuations. From 430°C during the day to -140°C during the night.
Astronauts can return from space up to 2 cm higher – due to absence of gravity.
Neutron stars are the fastest spinning objects in the universe.
In each of us are atoms that were once part of the stars and exploded billions of years ago.
There are approximately 10^22 to 10^24 stars in the observable universe.
The faster an object move in space, the slower time passes for it.
Large Magellanic Cloud is the second or the third-closest galaxy to the Milky Way, after the Sagittarius Dwarf Spheroidal and the possible dwarf irregular galaxy known as the Canis Major Overdensity.
In the next 1 second 300
In the next 1 second 3,000 stars will be formed and 30 stars will explode.
Dwarf planet 1 Ceres contains five times more water than water than Earth.
NGC 6872 is one of the largest known spiral galaxy.
Around our Galaxy orbit several smaller, so-called satellite galaxies.
The largest known star in the universe is Stephenson 2-18
Coldest known place in space is the Boomerang Nebula with temperature of 1 Kelvin (-272°C).
Pluto has up to 5 natural satellites.
Uranus is slightly larger in diameter than its neighbor Neptune, yet smaller in mass.
Earths rotation slows by about 1.7 milliseconds a century.
Mercury & Venus are the only 2 planets in our solar system that have no moons.
If a star passes too close to a black hole, it gets torn apart, ripped to shreds by the black holes immensely powerful gravity.
The hottest planet in our solar system is Venus.
Enceladus one of Saturns moons has the whitest, most reflective surface in the solar system.
The highest mountain discovered in our Solar System is the Olympus Mons, which is located on Mars.
The Whirlpool Galaxy (M51) was the first celestial object identified as being spiral galaxy.
The Milky Way galaxy is 105,700 light-years wide.
There are more stars in space than there are grains of sand in the world.
Pluto´s largest moon, Charon, is approximately half the size of Pluto.
Exoplanets are planets that orbit around other stars,
A sunset on Mars is blue.
Red dwarf stars that are low in mass can burn continually for up to 10 trillion years.
There are 88 recognized star constellations in our night sky.
The Earth weighs about 81 times more than the Moon.
A large percentage of asteroids are pulled in by Jupiter´s gravity.
A day on Pluto lasts 153.3 hours.
The first Supernovae observed outside of our own galaxy was in 1885.
Galaxies come in three main types: ellipticals, spirals, and irregulars.
Twinkling of stars is caused by the passing of light through different layers of a turbulant atmosphere.
The first footprints on the Moon will be there for millions of years until something happens to eliminate them.
The Sun´s mass takes up 99,86% of the Solar System.
Most widely accepted theory today states, that The Moon was formed during a collision between the Earth and another small planet.