It is almost as old as the universe itself. Bolhoop M13 is a collection of 300,000 stars that were created around 11.65 billion years ago - just 2 billion years after the Big Bang. At the time, our system was still young and had not yet found its flat spiral shape. The Milky Way contains at least 150 globe heaps and almost all of them are older than 10 billion years.
About the Eagle Nebula Huge columns of gas and dust, almost 50 trillion kilometers high. The Eagle Nebula is a birthplace for stars, and probably resembles the place where our own solar system was formed 4,567 billion years ago. The dense columns of the mist mainly consist of hydrogen and nitrogen, and these elements are colored green on this unique image of the Hubble telescope.
About red sprites Summer is the season of thunderstorms, so also of 'red sprites': red elves. These gigantic energy discharges can be seen as long red flashes at a height of 70 to 80 kilometers. They are created by very powerful, positively charged lightning bolts with a strength of 300,000 amperes: 10 times as violent as normal, negatively charged lightning.
About the Summer Triangle In the summer months, three of the brightest stars in the sky - Wega, Altair and Deneb - can be seen high in the sky in a clear triangle, which is also called the summer triangle. Despite its name, it is also visible in winter, but then the stars are closer to the horizon and the triangle is not so easy to find.
Over the next two nights, the largest meteor shower of the year, the Perseids, is causing a spectacular light show in the night sky. The Perseids reach their peak in mid-August, when the remains of the Swift-Tuttle comet burn in the night sky when they reach around 200.
If fireworks are not enough to celebrate something big, then here is a new option: a rain of falling stars. The Japanese company ALE has launched a satellite to deliver customized stars. The satellite has 400 balls to shoot at the earth, so that they burn in the atmosphere like shooting stars.
We know nothing about dark matter: not where it comes from, what it consists of and what properties it has. We only know that it exists, because we see that its gravity influences visible matter slightly. And yet we have become a little wiser now. Dark matter behaves strangely Dark matter does not divide itself over a galaxy as computer models predict.
About the lunar eclipse The earth casts a long shadow into the space, through which the moon occasionally passes. Sometimes the moon is completely covered by the darkest part of the Earth's shadow and we get a total lunar eclipse. Other times, that shadow falls only partially on the moon and so we also see a partial lunar eclipse - as now.
As our telescopes get better, astronomers gain more and more insight into the glowing gas balls that illuminate the universe. And recent observations have shown that the life of stars does not go entirely as described in the astronomical textbooks. All stars are born in pairs The astrophysicists Sarah Sadavoy and Steven Stahler came up with a radical hypothesis in 2017: according to them, all stars are born in pairs.
A thin ice crystal carpet ripples along the sky at 80-90 kilometers, ten times as high as normal clouds. The distant ice clouds are on the border between two layers high in the atmosphere. They can be seen because the sun is never more than 10 to 15 degrees below the horizon around midsummer night.
The sun, the earth and Jupiter are in a straight line, with the sun and Jupiter on either side of the earth. This phenomenon, called opposition, has two major advantages if we want to study the planet: the distance from the Earth to Jupiter is minimal and the planet is visible all night. Jupiter has 79 moons.
2900 Stars on a ball - you can now see it with binoculars. The Messier 11 star cluster is one of the most dense open star clusters in the Milky Way. It is also known as the Mallard Duck Cluster, as seen through a small telescope, it has a triangular shape reminiscent of a flight of wild ducks.
About Cassiopeia In 1572 Tycho Brahe discovered a supernova in the constellation Cassiopeia. He was the founder of modern astronomy, who has since shed light on the many planets of Cassiopeia. Around 14 stars with certainty exoplanets. One of them, HD 219134 b, is a rock planet with a three-day orbit that is 4.5 times as massive as the earth and only 21 light years away.
Researchers calculated that the radiation from a supernova at 26 light years from the Earth would destroy half of the ozone layer, causing more harmful UV radiation from the sun to reach the Earth. The higher radiation is at the expense of phytoplankton, which produces half of the oxygen in the atmosphere.
About the six-fold star At first glance, the star Mizar looks like the other in the Saucepan. But if you look better, you can see that one is close by: Alcor. Alcor and Mizar are only separated by about a light year and the two stars revolve slowly around each other. © Shutterstock Mizar and Alcor have been known since ancient times, but in the 17th century astronomers discovered that Mizar itself was twofold.
About Zwaan In the northern hemisphere, Zwaan is one of the brightest constellations. The star Deneb, which forms the tail of the swan, is particularly recognizable. Deneb is 1500 light years away, but because it is one of the brightest stars in the Milky Way - with 200,000 times as bright light as that of our sun - it is clearly in the sky.
About the meteor shower The Eta-Aquarids return every spring in April and May. The meteors of this swarm are remnants of Halley's comet, which itself comes across the earth every 75 years - last in 1986 and next in 2061. On its way through the solar system, the comet leaves ice and grit.
The universe probably originated with a giant explosion. But then it became quiet ... very quiet. According to the theories of astrophysicists, the universe was completely shrouded in darkness for almost 200 million years after the big bang. Only then did the hydrogen atoms get close enough together to ensure that the fusion hearts of the first stars began to beat.
What is the definition of a pulsar? A pulsar is a fast rotating neutron star with a powerful magnetic field. The star emits electromagnetic radiation. It can be collected on Earth as waves pulsing in time with the star's revolutions. And that goes super fast: The fastest spinning neutron star found so far, rotates around its axis 716 times per second.
A star is born A star is born when a huge cloud of gas and dust collapses under its own gravity. The pressure and temperature inside rise so high that hydrogen nuclei fuse together (fuse). Hydrogen is then converted into helium, which releases a lot of energy. Heavy star has more mass than the sun A star with more than eight times as much mass as the sun is called a heavy star.
About the galactic battle While the animals on Earth took their first steps on the seabed half a billion years ago, the NGC 5195 system popped at its big brother, the Maelstromstysteem. Hundreds of millions of years later, the two systems do this again. © NASA The ongoing battle of the two systems has probably caused the striking spiral arms of the Maelstrom system.