Mercury's ice trap (NASA /JHUAPL/CIW) is close to the blazing sun, which is not where most people think that frozen ice can be found. But when Mercury revolves around its fiery home planet, some craters at the poles are always hidden in the shadows. At the ambient temperature of minus 280 degrees Fahrenheit (minus 173 degrees Celsius), these "deep freezing traps" are the best places for water ice accumulation for hundreds of millions of years. Sean, head of the Department of Geomagnetism at Carnegie College in Washington? "In short, these ice layers can hold more water than similar deposits on the moon," Sean Solomon told Life Science.
(NASA /JPL/ USGS) The weather is hot and dry, and it seems unlikely that Venus will have an oasis. However, 30 miles (48 kilometers) above the surface of its hell, there is a layer of clouds, and the conditions are extremely mild. The temperature and pressure here are not completely different from those on the earth's surface. Adequate sunlight and complex chemicals can provide energy for photosynthetic and chemosynthetic organisms. The only drawback? There is a considerable amount of sulfuric acid in the clouds. However, the extreme microorganisms on the earth have once again experienced a worse environment.
The comet asteroid Phaeton (Arecibo Observatory/National Aeronautics and Space Administration /NSF) has a rare blue color and an extremely strange orbit, which makes it close to the sun and then pass through Mars. This orbit is a typical ice comet, but when Faton approaches the central star of the solar system, it does not produce a beautiful tail coma that almost all comets have, so many astronomers think it is more like an asteroid. There are many theories about what happened to this strange celestial body, including that it may be a dormant comet or a comet that has become an asteroid over time.
Ida and DACTYL (NASA /JPL/ USGS) 1993, the Galileo spacecraft is on its way to Jupiter. Along the way, it stopped to photograph an unusual celestial body-asteroid Ida, which became the second asteroid ever detected by the probe. Ida brought scientists a little surprise: a small satellite named Daktir, which is the first satellite to orbit an asteroid. These two objects are a bit strange because they have experienced space weathering from the sun, which causes their surfaces to turn red with time. Scientists are still scratching their heads about Ada's age and how she got this small satellite.
Janus and Epimetheus (NASA /JPL/ Institute of Space Science) Saturn is the host of all kinds of wonderful satellites. Its two potato-shaped satellites, Janus and Empimetheus, are arranged in a unique way. These special partners share an orbit, and one of them is 3 1 mile (50 km) closer to Saturn than the other. About once every four years, the distant moon will catch up with the closer moon, and the two moons will generate gravity and change their positions. No other satellite in the solar system knows such an orbital exchange mechanism.
Arpett is the third largest Saturn satellite of NASA /JPL/ Institute of Space Science. It is a walnut-shaped wonder with a convex equator and a black and white surface. One hemisphere of the satellite is black, while the other hemisphere is much brighter. A rising mountain range surrounds the equator, including some of the highest peaks in the solar system. So far, no one can explain the two-color appearance of Partos; Some astronomers think that the darker side may be caused by particles from Phoebe, another satellite of Saturn, or by dark hydrocarbons emitted by the icy volcano. There is even a conspiracy theory rumor that Partos is not a natural satellite, but was built or transformed by an alien civilization, although this possibility is far beyond the mainstream scientific thinking. KDSPE Miranda's Cliff Kdspe (photo credit: JPL/ NASA) Kdspe ice giant Uranus Moon Miranda is a dream of cave exploration-its serrated surface is covered with canyons, steep slopes, terrace outcrops and cliffs, and its ground is about 12.4 miles (20 kilometers). Miranda's geological scar may be due to the ice flowing inside the moon being pushed to the surface at some point. A crazier theory holds that the moon was smashed several times and then fused together, forming a very uneven feature.
Triton and Proteus (National Aeronautics and Space Administration /JPL/ US Geological Survey) Triton is the largest satellite in blue Neptune and the only round satellite. This satellite is the first choice for researchers to launch spacecraft because it has many strange properties. Triton is in a "retrograde" orbit, which is opposite to the rotation direction of planets and other satellites, indicating that it may be a captured Pluto-like object. A strange mountain of ice and fire rises from its surface, making it one of the farthest celestial bodies known to have active geophysics in the solar system. Neptune's second largest satellite, Neptune's brother, Proteus, is also unusual. The moon is not round. Its shape is like an irregular "polyhedron" (a solid with many planes) described by mathematicians, and it is also like a 20-sided dice described by the nerd of Dungeons and Dragons. Proteus has a pink surface, which may be the result of complex organic compounds such as hydrocarbons.
After Ultima Thule (NASA/Johns Hopkins Applied Physics Laboratory/Southwest Research Institute/National Optical Observatory) was accelerated by Pluto, NASA's "New Horizon" mission briefly encountered a more distant celestial body. This frozen Kuiper Belt object is called Ultima Thule, which initially looks like two spheres glued together to form a celestial snowman. But after the spacecraft completed its flight, it was found that Ultima Thule was as flat as a pancake, more like two jumping stones, and somehow they wedged each other. Scientists may think about this strange situation for a long time.
The tail of the sun (NASA) is located at the edge of the solar system, and its influence is almost exhausted. There is a large building called "the end of the sun". The tail drags behind the bullet-shaped sphere of the sun, and the bubbles around the solar system are produced by the wind and magnetic field of the sun. It was not until 20 13 that NASA's Interstellar Boundary Explorer (IBEX) photographed a comet similar to the tail of the sun that it was found to be like a four-leaf clover. The researchers told Space, the sister website of Live Science, that this quadratic shape is due to the solar wind emitting near the poles of the sun, while the solar wind flows slowly near the equator of the sun.