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Earth's rotation

A black hole is a kind of celestial body that exists in the universe in the modern general theory of relativity. The gravity of a black hole is so strong that the escape velocity within the event horizon is greater than the speed of light

In fact, the stars are always there, but our environment blocks our eyes

Uranus (English: Uranus, astronomical symbol: ⛢, astrological symbol: ♅), one of the eight planets in the solar system, is the seventh planet in the solar system from the inside out (18.37~20.08 AU), and its volume ranks third in the solar system (larger than Neptune), fourth in mass (less than Neptune), and orbits the sun almost lying horizontally

Just how scary is Jupiter? This is a topic we often talk about. Why do we find Jupiter scary? I think it has something to do with some features of Jupiter that are beyond our imagination.

Jupiter has been known since ancient times because it is easily visible to the naked eye at night and occasionally during the day when the sun is low. In Babylon, this celestial body represented their god Marduk

What can we do if sea water disappears?

The fins of the red dragon juveniles are pale golden green, the edges of the scales are slightly pink, and the mouth is light red. When adults, the fish is golden-yellow, with a slightly golden-red scale frame on the edge of the scales, special dark red markings on the mouth and operculum, and dark red on all fins.

Klein bottle, in the field of mathematics, refers to a plane without orientation, such as a two-dimensional plane, there is no "inner" and "outer" distinction. A Klein flask is an unorientable topological space in topology. The Klein bottle was originally proposed by the German geometry master Felix Klein. In 1882, the famous mathematician Felix Klein discovered the famous "bottle" that was later named after him. The structure of a Klein bottle can be described as: a bottle with a hole in the bottom now extends the neck of the bottle and twists into the bottle and then connects with the hole in the bottom. Unlike the cups we usually use to drink water, this object has no "edges" and its surface doesn't end. Unlike a sphere, a fly can fly directly from the inside of the bottle to the outside without going through the surface, i.e. it has no distinction between inside and outside.

The Sun is the central celestial body of the solar system, occupying 99.86% of the total mass of the solar system. The eight planets, asteroids, meteors, comets, trans-Neptunian objects, and interstellar dust in the solar system all revolve around the sun, and the sun revolves around the center of the Milky Way.

Wormhole, also known as Einstein-Rosen bridge, is also translated as wormhole. It is a narrow tunnel that may exist in the universe connecting two different space-times. Wormhole is a concept first proposed by Austrian physicist Ludwig Frahm in 1916. It was assumed by Einstein and Nathan Rosen in 1930 when they studied the gravitational field equation. Instant space transfer or time travel. This theory was proposed by Albert Einstein. Simply put, "wormholes" are thin tubes of space-time that connect distant regions of the universe. Dark matter keeps the wormhole's exit open. Wormholes could connect parallel universes with baby universes and offer the possibility of time travel. Wormholes may also be time-space tunnels connecting black holes and white holes, so they are also called "grey roads". In theory, a wormhole is a space tunnel connecting two distant time-spaces, like a vortex in the sea, which is ubiquitous but fleeting. These space-time vortices are caused by a combination of stellar rotation and gravitational forces. Just as a whirlpool can bring the local water surface closer to the water bottom, it can make two relatively far away local spaces instantly close together. However, some people have hypothesized that a strange matter can keep the wormhole open, and others have hypothesized that if there is a strange matter called phantom matter, because it has both positive energy and negative mass, it can create a repulsive effect to prevent Prevent the wormhole from closing. So far, scientists have not observed evidence of wormholes.

Eight planets (8 Planets), refers to the eight planets of the solar system, according to the distance from the sun from near to far, they are Mercury (☿), Venus (♀), Earth (⊕), Mars (♂), Jupiter (♃), Saturn (♄), Uranus (♅), Neptune (♆ or ⛢)

Which cats can affect a couple's relationship?

If the elevator suddenly falls, can we jump up and avoid injury when the elevator will reach the ground? I think many people have thought about this question, and the answer is in the video

Let's assume, how long would the earth live if Jupiter suddenly disappeared?

How scary are black holes?

Suppose what would happen if our waters were gone?

Suppose our earth stopped spinning, what would happen? How long would we live?

In the Karakum Desert in the Central Asian country Turkmenistan, there is a famous scenic spot called "Gate of Hell",It's a pit, and it's always burning bright, it's been 50 years

Explore and discover the universe, let us know more