Mysterious radio signal (NRAO EXTRANCE/T. Jarrett (IPAC/Caltech); B saxton, NRAO/AUI/ National Science Foundation) Since 2007, researchers have been receiving ultra-short and ultra-bright radio signals with a duration of only a few milliseconds. These mysterious flashes are called fast radio bursts (FRB), and they seem to come from billions of light-years away (they are neither aliens nor aliens). Recently, scientists successfully captured a repeated FRB, which flashed six times in a row. This is the second such signal in history, and it is also a signal that can help them solve this mystery.
Nuclear spaghetti
(National Aeronautics and Space Administration/JPL California Institute of Technology) The strongest substance in the universe is formed by the remains of a dead star. According to the simulation, protons and neutrons in the star's dry shell will be subjected to crazy gravitational pressure, squeezing them into a mass similar to Linguini, which will break, but only when you apply a force 65.438+0 billion times that required to crush steel,
Haomeiya has a ring (IAA-CSIC/UHU), a dwarf star that runs in the Kuiper Belt outside Neptune, which is very unusual. It has a strange slender shape, two satellites, which last only four hours every day. It is the fastest rotating big celestial body in the solar system. But in 20 17, when astronomers saw it passing in front of a star and noticed the extremely thin ring around it, it became even weirder, which was probably the result of a collision at some time in the distant past.
The moon with the moon (NASA /JPL/ Institute of Space Science) is better than the moon. The moon orbiting the moon is called the moon on the Internet. Satellites are also called subsatellites, satellites, large satellites, satellites and the moon. They are still theoretical, but recent calculations show that their formation is not impossible. Maybe one day astronomers will find one.
Dark matter-free galaxies (NASA, ESA and P.van Dokkum (Yale University)) Dark matter-an unknown matter that accounts for 85% of all matter in the universe-is strange. But researchers are sure of at least one thing: dark matter is everywhere. Therefore, the team members are scratching their heads for a strange galaxy that they discovered in March 20 18, which seems to contain almost no dark matter. Subsequent research shows that strange celestial bodies actually contain dark matter, although this discovery absurdly believes another theory that dark matter does not exist at all. * * * Get up, astronomer! "
"The Strangest Star" (NASA/JPL California Institute of Technology) When astronomer Tabitha Bo Aguiam of Louisiana State University and her colleagues first saw this star named KIC 846285, they were puzzled. The brightness of this celestial body, nicknamed "Tiger Spotted Star", will drop at irregular intervals and odd time periods, sometimes even by 22%. People have quoted different theories, including the possibility of giant structures of aliens, but now, most researchers believe that there is an abnormal dust ring around the star, which is the dust ring that causes darkness.
NASA /JPL California Institute of Technology/Institute of Space Science is the strangest lunar solar system, which may reach many celestial bodies-Jupiter's excessive volcano Io and Neptune's Poseidon fountain. But the strangest thing is Saturn's Hyperion, a pumice-like irregular rock covered with numerous craters. The Cassini spacecraft of NASA visited Saturn system from 2004 to 20 17, and also found that Hyperion was charged by the "particle beam" injected into space by static electricity.
It is a neutrino (Desi of the Science Communication Laboratory), a high-energy neutrino that hit the earth on September 22, 20 17. It's not that special itself. Physicists at ice cube Neutrino Observatory in Antarctica will see neutrinos with similar energy levels at least once a month. But this time is special, because it is the first time to reach the earth with enough information about the origin of the earth, and astronomers can point the telescope in the direction it came from. They found that it was thrown to the earth by a lazare like a flare 4 billion years ago. lazare is a supermassive black hole in the center of the Milky Way, which has been consuming the surrounding materials.
The living fossil galaxy (a.Romanowsky/UCO/D.Martinez delgado/Ali) DG Sati is a hyperdiffusion galaxy (UDG), which means it is as big as the Milky Way, but its star is so thin that it is almost invisible. However, when scientists saw the ghostly DGSAT 1 in 20 16, they noticed that it was sitting alone, which was very different from other udgs. They were usually found in star clusters. Its characteristics show that this dim celestial body was formed in a completely different era about 1 100 million years after the big bang, making DGSAT 1 a living fossil.
Curved light of two quasar images (NASA Hubble Space Telescope, tommaso Treu, and University of California, Los Angeles, Biller, etc. ) is enough to make them distort the image of things behind them. When researchers used the Hubble Space Telescope to find a quasar from the early universe, they used it to estimate the expansion speed of the universe and found that it is expanding faster today than then-a finding that is inconsistent with other measurements. Now physicists need to find out whether their theory is wrong or something strange has happened.