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How can space expand faster than the speed of light?
Space cannot expand faster than the speed of light (“the speed of expansion of space” is generally a confusing term, to determine “speed” you need to at least set the size/volume of space). You probably meant the fact that there are objects (located behind the Hubble sphere) that are moving away from the observer (i.e.…
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NASA plans to accelerate the arrival of aliens on planet Earth
NASA experts have reported on the possibility of contacting an alien intelligence. Scientists were united in the Beacon in the Galaxy project. We are talking about employees of NASA’s Jet Propulsion Laboratory and experts from leading universities in China, the Netherlands and Britain. It turned out that a letter was written for the aliens, including…
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NASA astronomers shocked people with their statement.
Experts have found out that already this Sunday evening a giant asteroid will approach the Earth. Experts have found out that an asteroid 500 meters in size is capable of causing serious damage if it collides with the planet. Scientists consider the cosmic body to be “potentially dangerous” because it will sweep at a distance…
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NASA has created a “virtual Mars” on the Unreal Engine 5
Space agency specialists use the Unreal Engine 5 engine from Epic Games to create a virtual reality environment that will help prepare astronauts for life on the Red Planet. Novice astronauts will be able to simulate various aspects of life on Mars, starting with the construction of a home base, performing its maintenance and ending…
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Chinese rover “Zhuzhong” found traces of water at its landing site
The Chinese rover “Zhuzhong” has found evidence that water remained on Mars in liquid form much longer than previously thought. It is believed that Mars was wet at least 3 billion years ago — during the so—called Hesperian period, named after the Hesperides plateau – and later became dry and cold. The data obtained by…
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If light cannot leave the event horizon of a black hole, why does gravity leave it?
If we use only General Relativity, then gravity never leaves the event horizon. The mass of a black hole in the process of its evolution can only increase. However, the situation changes if we try to use quantum physics. However, it should be taken into account that there is no full-fledged theory of quantum gravity…
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How many suns can a planet have?
Planets with two suns, such as in Star Wars, are not uncommon, especially on a cosmic scale. Three suns are much rarer, however, there are such cases. The question of how many suns a planet can have in principle is quite complicated. The fact is that the approximate distance at which the stars stop interacting…
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Does the Earth’s gravitational field rotate?
This is quite an interesting question actually. How can we usually judge the rotation of some abstract field? By moving its power lines. However, the problem is that no one has ever seen the lines of force of the earth’s gravitational field (and indeed any gravitational field), no instruments have registered, and it is difficult…
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Ingenuity temporarily stopped responding to requests
At the end of last week, the Ingenuity helicopter managed to restore communication with the Perseverance rover after a short-term disruption: its onboard computer turned off due to lack of power. Ingenuity was put into a state of reduced power consumption because the charge of six lithium-ion batteries fell below a critical level. Now the…
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Why don’t a lot of artificial satellites orbiting our orbit collide with each other?
Now there are more than 3,000 active satellites in Earth orbit, and the same number of those that have already failed. In total, there are more than 100 million fragments in near-Earth orbits. These fragments are space debris ranging in size from 1 mm. The dimensions of near-Earth space are quite large. But if we…
