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This is our pick of the most mind-boggling facts about space: our Moon, our Solar System, our Galaxy and our Universe.
Learn about the silent vacuum of space, the hottest planet, the possible life on Mars, the planet of diamonds, and more. This web page offers a list of 50 space facts that are awe-inspiring, jaw dropping, and unbelievable.
- Olbers’ Paradox
- Hubble’s Law
- The Cosmic Background Radiation
- The Farthest Your Eyes Can Look
- On A Collision Course
- Dark Matter
- Supermassive Black Holes
- How Fast Is The Earth Moving?
- There Is Gravity on The Iss
- The Sun Is A Green Star
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If the Universe is infinite, there should be an infinite number of stars, which means day and night would be equally bright. This paradox, named after Heinrich Olbers, argues that the Universe cannot be infinite and static. Today we know that the visible Universe is finite (around 46 billion light years) since light from distant regions is yet to t...
The Universe is expanding in all directions, at a faster rate the farther away we look. In 1929, Hubble discovered that stars appear slightly redder than one would expect based on their spectra alone.2Just as sound in the air has a lower pitch when the source is moving away from us, light emitted by distant galaxies becomes redder (shifts toward lo...
The Universe is expanding, so we naturally expect that it must have started at a single point of infinite density sometime in the past, which expanded suddenly in an event known as the Big Bang. This early explosion scattered a ball of glowing fire across the whole Universe, which we can observe today as Cosmic Background Radiation (CBR). It was di...
Andromeda is the nearest major galaxy to the Milky Way, with a mass approximately twice that of our galaxy. As the name suggests, it is visible in the constellation of Andromeda around autumn and winter, appearing as a smudge of light larger than the full Moon. It has its own set of satellite galaxies, the largest of which are M32 and M110, both cl...
Andromeda is on a collision course with our galaxy. It is believed that they will merge to form an even bigger galaxy in around 4.5 billion years. 3 However, it is improbable that any given star or planet will individually collide, as the space between them is immense. Such collisions are relatively common in the Universe. Indeed, several dwarf gal...
Stars at the edge of our galaxy move faster than we predict based on the distribution of visible matter in our galaxy. The simplest way to resolve this discrepancy is to postulate the existence of non-luminous matter, which we call dark matter.4
Einstein’s theory of general relativity first predicted black holes. When massive stars explode, they leave behind a remnant core. If the mass of the core is greater than three times the Sun’s mass, the force of gravity overcomes all other forces, giving rise to a black hole. Almost every galaxy has a black hole located at its center. These are oft...
Earth orbits around the Sun at an average velocity of 30 km/s (or about 67 miles per hour), while spinning about its axis at a velocity of 0.5 km/s (1.19 miles per hour) at the equator. Our solar system travels around the center of our galaxy at around 220 km/s (about 492 miles per hour). In turn, the galaxies in our neighborhood are rushing at a s...
You have probably seen videos of astronauts floating around the International Space Station (ISS), and you may think that it has something to do with Earth’s gravitational attraction being much weaker in space. However, the gravitational acceleration on the ISS is just 10% weaker than it is on the Earth’s surface. So why do astronauts float? Astron...
Every star emits light according to the so-called black body distribution law. The wavelength at which this distribution peaks depends on the star’s surface temperature, and it is related to the wavelength of maximum emission through Wien’s Law. Since the Sun has a surface temperature of 5778K, its wavelength of maximum emission is at 500nm, corres...
Learn about the Universe, galaxies, black holes, dark matter, and more with these mind-blowing scientific discoveries. Find out how fast the Earth is moving, why the night sky is dark, and what color is the Sun.
21 de nov. de 2023 · Learn about the universe's mysterious alien planets, stars, black holes, and cosmic curiosities that defy logic. Discover how long it takes to walk to the moon, why Mars is red, and how big the Andromeda Galaxy is.
22 de mai. de 2024 · Is it true that tears fly upward in space, and astronauts grow taller? See if you can tell fact from fiction in this quiz! Test your knowledge and discover fascinating facts about humanity's adventures beyond the Earth!
4 de out. de 2011 · From its expansion and acceleration to dark matter and energy, the universe continues to surprise astronomers. Here are some of the most surprising and interesting facts about the universe we...
13 de jun. de 2018 · Here are 20 interesting astronomy facts that you might not know. 1. Uranus Is Tilted. Ah, Uranus. It’s every school child’s favorite planet. But crude jokes aside, the planet is pretty fascinating. Among the most interesting aspects of Uranus is that it is titled completely on its side.
