How would you describe a black hole?
A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.
Who discovered black hole?
British astronomers Louise Webster and Paul Murdin at the Royal Greenwich Observatory and Thomas Bolton, a student at the University of Toronto, independently announced the discovery of a massive but invisible object in orbit around a blue star over 6,000 light-years away.
What is black hole theory?
A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
Can we see black holes?
You can ‘see’ the closest known black hole to Earth with the naked eye. There is a black hole in our backyard. Astronomers have found the closest black hole yet at just 1000 light years from Earth, close enough to see the stars that orbit it without a telescope.
How many black holes are in the Milky Way?
ten million
Is the space dark?
Space Is Dark, But Scientists Have Found Unexplained Light : NPR. Space Is Dark, But Scientists Have Found Unexplained Light Scientists have used a NASA probe way out in space, beyond Pluto, to measure visible light that’s not connected to any known source such as stars or galaxies.
What happens to human waste in space?
Current waste disposal methods on the International Space Station rely on astronauts manually processing trash by placing it into bags then loading it onto a designated vehicle for short term storage, which depending on the craft, returns the trash to Earth or burns up in the atmosphere.
What does space do to your body?
Increased risk of cancer and degenerative diseases, such as heart disease and cataracts, have been observed in human populations exposed to radiation on Earth. Health risks for astronauts from radiation exposure in space are mainly driven by long-term impacts.
Does earth smell bad to astronauts?
Anderson, who is releasing a memoir in June of his time as an astronaut, said after being in the sterile environment of space, everything has a sharper smell when returning to Earth. “Your sense of smell and taste are dulled in space. I craved the aroma of leaves and grass and flowers and trees,” he said.
Do astronauts shower?
The astronauts wipe their body clean by using a wet towel, and wash their hair by using waterless shampoo. Since water does not flow in a zero-gravity environment, the astronauts cannot wash their hands under a faucet as you do on Earth. So, there are no sinks or showers inside the space shuttle.
Do astronauts smell?
As it turns out, space actually does have a distinct odor. Astronauts returning from space claim that their suits smell, in a word, burnt. The lingering scent of space is “acrid” and “metallic,” reminding the astronauts of charred meat or welding fumes.
How dangerous is moon dust?
Future moon missions are at risk because of lunar soil. It seems harmless, but moon dust can actually damage scientific equipment and be harmful to human health: It is like a sticky powder made from shards of glass.
What does it smell like on Mars?
Based on the make-up of the planet and atmosphere, researchers have concluded that Mars smells like rotten eggs. The planet’s outermost layers are mostly made up of hydrogen and helium, which are pretty much odourless.
Which planet smells like rotten eggs?
Uranus
What does it feel like on Mars?
If you were to stand on the surface of Mars on the equator at noon, it would feel like spring at your feet (75 degrees Fahrenheit or 24 degrees Celsius) and winter at your head (32 degrees Fahrenheit or 0 degrees Celsius).
What do you hear on Mars?
If you were standing on Mars, you’d hear a quieter, more muffled version of what you’d hear on Earth, and you’d wait slightly longer to hear it. On Mars, the atmosphere is entirely different. But, the biggest change to audio would be to high-pitch sounds, higher than most voices.
Can you talk on Mars?
All communication between Mars and Earth goes through satellites. Because of the distance, there is a substantial delay. As communication signals travel at the speed of light, this means that it can take between 3 and 22 minutes for the information to reach the other end, so a phone call would not be practical.
Can we talk on Mars?
Given that sound waves need an atmospheric medium through which to travel, many people are surprised to learn that any sounds at all can be heard on Mars. But even at Mars’ low pressure, acoustic signals within the frequency range of the human ear can be detected.