A bomb can explode in space, but the effect is very different than on earth. When a bomb explodes on earth, a wave of high pressure is generated, propagating through the air. However, in a vacuum, and that is the space, there is nothing in which a pressure wave can expand. Explosions in the space are nevertheless dangerous, because hot gases and shards spread in all directions.
Laten we een blokje om gaan in het heelal! Zo luidde op 26 april 1920 de uitnodiging aan het publiek van het Smithsonian National Museum of Natural History in Washington D.C. Twee astronomen gaven een lezing, en op basis van het programma kon niemand voorspellen dat het tot een hevige botsing zou komen.
OVER 800 MLN YEAR - Earthly life suffocates and burns The sun is the greatest enemy of the earth. The burning of our star is steadily increasing over the next few hundred million years. The earth is like a steak in a pan on a fire that goes higher and higher. Life will probably gradually die out.
White holes are a purely mathematical answer to comparisons in Einstein's general theory of relativity. That means we don't know if they really exist. Purely mathematically you can see a white hole as a black hole in which time goes back. The physics laws of the theory of relativity are always the same whether time is moving forward or backward.
Midway through the 18th century, French astronomer Charles Messier was looking for comets. They were difficult to find with the equipment of that time, so it was a complex job. In 1758 he came across an object that looked like a comet through his telescope, but could not be. Namely object stood still in the sky.
Because the universe is constantly expanding, we can determine its age by the light that we observe. Measurements show that the oldest light is 13.7 billion years old. Just after the big bang it was so hot that the universe was an opaque plasma that you can't see through with the best telescopes and measuring equipment.
Just after the big bang, the newly created universe grew from the size of an electron to a football. This inflation went faster than the light and lasted one billionth of a billionth of a billionth of a second. The expansion then continued at a slower pace. The universe was blown up like a balloon, and the entire cosmology is based on this one fundamental event.
In science fiction films such as Star Wars you hear all kinds of sounds in the room. And in Alien, the spaceship Nostromo makes a huge noise as it flies by, and even explodes later with a deafening blow - although the movie poster says no one can hear you scream in space. Sound does not reproduce in a vacuum The poster is right: sound cannot reproduce in a vacuum.
What do we know We are in a universe that is 13.7 billion years old. However, as it expands, the visible universe is larger than you might think. For example, a galaxy whose light has been traveling for 10 billion years is not 10 billion light-years away. It is farther away because the universe has expanded as the light came to us.
What do we know If you analyze the light from distant galaxies, it appears that on the way to Earth it is deflected more than expected. The gravity of the systems where the light passes by is too small to deflect the light so strongly. That is why astronomers assume that there is dark matter, which provides the missing gravity.
Even when we sit still in a chair, we are constantly on the move. First of all we follow the earth's rotation around its own axis. The speed of that movement depends on our position on the globe; at the equator the rotation speed is 1670 km / h, at our latitudes lower. We race through the Milky Way But on Earth we also make an orbit around the sun with a speed of 107.
The phosphorus element is vital for life on earth. Phosphorus is in our cell membranes, helps to keep all cells alive and forms the backbone of the DNA. Without phosphorus, life as we know it would not exist. But phosphorus is only suitable for the building blocks of life if it occurs in phosphate, phosphoric acid and other water-soluble compounds.
Jupiter - the giant planet Jupiter is the giant of the solar system. It is the first of the outer gas planets and weighs more than twice as much as all other planets of the solar system combined. Jupiter is a gas planet and therefore has no solid surface. It consists of gas and may have a fixed core.
MARS Rover must collect red dust. Marsrovers like Curiosity are equipped with advanced tools that can deliver piles of mineral information on Mars. But nothing makes up for the thorough analysis in laboratories on earth, and that is why the American NASA and the European ESA want to launch a Mars mission together in 2026.
The a-ring of Saturn as seen by the Cassini on September 13, two days before he burned in the atmosphere of Saturn. © NASA / JPL-Caltech / Space Science Institute The outer ring of Saturn, including the moon Daphnis. The photo is from September 13. © NASA / JPL-Caltech / Space Science Institute The northern hemisphere of Saturn as seen by the Cassini when it last passed on September 13.
OSIRIS-REX brings a 2 kilo sample. HAYABUSA-2 takes the first sample. DART pushes a planetoid out of course. LUCY visits six asteroids at Jupiter. PSYCHE investigates asteroid of metal. With a bang a shot breaks the enormous silence. But nobody hears it, because the projectile is fired 300 million kilometers from the Earth at the diamond-shaped asteroid Ryugu - by an automatic mechanism on the Japanese space probe Hayabusa-2.
1. WARM SOURCES GIVE HOPE TO LIFE ON ICE MOON Hydrogen shoots up through the ice layer from hot springs on Enceladus, the moon of Saturn. The hydrogen fumes give rise to hope for life in the sea under the ice. 2. MARATHONSONDE STARTING ENGINE AFTER 34 YEARS Voyager 1 has long since left the solar system - it is no less than 21 billion kilometers away.
The strangest star in the universe. That is what KIC 8462852 is called by astronomers. The star is about 50 percent larger than the sun and about 1000 degrees warmer, and is about 1000 light-years away from us. The strange thing about the star is that its brightness decreases and becomes stronger again in a way that we do not know from other stars.
A 45-year-old telescope in Arizona in the US may help solve one of the greatest mysteries of the universe. It is equipped with 5000 pencils the size of a pencil, which are programmed to point a fiber optic cable at one galaxy and take color samples of its light.
What do we know Deoerknal theory describes the universe from the time it was smaller than an atom. But the theory does not tell us how or why the universe originated - and certainly not what was before. It is possible that time and space as we know it came about in the big bang. But that doesn't rule out that they have a background in something that was already there before the big bang.
Celestial bodies such as stars and planets are so heavy that gravity always beats all other forces. That makes them round. Due to gravity, the rock in a planet attracts and the gases in a star attract all other matter, and everything tries to get as close as possible to the core of the celestial body.