iamencyclopedia

  Does sound travel faster in space? Sound does not travel at all in space. The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound. If you are sitting in a space ship and another space ship explodes, you would hear nothing. Exploding bombs, crashing asteroids, supernovas, and burning planets would similarly be silent in space. In a space ship, you could of course hear the other passengers because your ship is filled with air. Additionally, a living human will always be able to hear himself talk, breath, and circulate blood, because the air in his space suit which sustains his life also transmits sound. But two astronauts in space suits floating around in space will not be able to talk to each other directly no matter how hard they yell, even if they are only inches away. Their inability to talk directly is not caused by their helmets getting in the way, but is rather caused by the vacuum of space not c

  What Is a Gravitational Wave? A gravitational wave is an invisible (yet incredibly fast) ripple in space. Gravitational waves travel at the speed of light (186,000 miles per second). These waves squeeze and stretch anything in their path as they pass by.   A  gravitational wave  is an invisible (yet incredibly fast) ripple in space. We’ve known about gravitational waves for a long time. More than 100 years ago, a great scientist named Albert Einstein came up with many ideas about  gravity  and space. Einstein predicted that something special happens when two bodies—such as planets or stars—orbit each other. He believed that this kind of movement could cause ripples in space. These ripples would spread out like the ripples in a pond when a stone is tossed in. Scientists call these ripples of space  gravitational waves . Gravitational waves are invisible. However, they are incredibly fast. They travel at the speed of light (186,000 miles per second). Gravitational waves squeeze and str

                          Can a star turn into a planet? Yes, a star can turn into a planet, but this transformation only happens for a very particular type of star known as a brown dwarf. Some scientists do not consider brown dwarfs to be true stars because they do not have enough mass to ignite the nuclear fusion of ordinary hydrogen. At the same time, some scientists do not consider brown dwarfs to be true planets either because they typically sit at the center of a solar system, just like a star. A brown dwarf is a strange object with a mass that is greater than the biggest regular planets (i.e. above 13 times the mass of Jupiter) and less than the smallest regular stars (i.e. below 80 times the mass of Jupiter). Although a brown dwarf does not have enough inward gravitational pressure to ignite the nuclear fusion of regular hydrogen, it does have enough to ignite the nuclear fusion of  heavy  hydrogen (deuterium). Early in the life of a brown dwarf, the nuclear fusion of its heavy

  Why do only humans "float" on the moon, not rocks or lunar rovers?   Humans don’t “float” on the Moon. When humans choose to jump on the Moon, because the Moon has only 1/6th of Earth normal gravity, they can jump higher than they can on Earth, and they take longer to come down than they would on Earth, so they have a slow-motion fall. They’re still falling, not floating.   Lunar rovers are cars, so they don’t jump, but if you pushed one off a high cliff on the Moon, it would also fall to the ground much more slowly than it would on Earth. Rocks don’t randomly jump on their own either, but if you tossed a rock up, it would take much longer to come down than you’re used to.   Have a look at this video of Apollo 15 astronau t David Scott, dropping a hammer and a feather on the Moon to prove that — without air resistance — they would fall at the same speed, which they do,   Watch him drop both objects and observe how much more slowly the hammer falls than it wo

  What is by far the safest planet besides Earth? Venus; specifically, a location within her atmosphere roughly 55km (34mi) above the hellish surface; the pressures, temperatures, radiation levels, and gravity are all Earthlike at this altitude: 27 °C (80 °F) at 0.5 bars (50 kPa) with radiation similar to “northern Canada” and 91% Earth gravity. The skies of Venus are the only place in the entire solar system besides Earth where a human being could venture outside without a space suit; a simple face mask would provide breathing air. Additionally, the proximity of Venus to Earth makes for a much shorter trip than a Mars mission, and her Earthlike gravity poses no health complications.   In the 1980s, the Soviet Union explored the Venusian atmosphere with balloon probes. And now NASA has released a proposal for floating bases, illustrated below. Since the atmosphere is mostly heavy carbon dioxide, plants would flourish, parachutes would effectively slow entering spacecraft, and ord

  What planets have the weirdest cycles? Mercury is a strange planet. Not very hospitable, temperature going from -173 to 427, which freaking sucks. For a human.     I always thought it was interesting how it takes 88 days for the planet to go around the sun (it’s the closet planet to the sun). But it takes 176 days for the planet to fully rotate.   Essentially, its day is twice as long as its year.   What’s crazy too, it’s actually not the hottest planet either. Even though it is right near the sun. That’s because it has no atmosphere. Cooling effects are quicker.   Venus:     On the other hand, hangs out 460–472C. Not even a tardigrade can hang with that. But Venus does have a lot in common with Earth otherwise. It’s of similar size and has a core, mantle, and crust.   Also, and I’m not sure why, but Venus spins in the opposite direction of every other planet in the solar system. Space is a weird place.  

  What is the scariest planet? One of them has definitely got to be the planet of PSR B1257+12, a star of the Virgo constellation.   This tiny planet is one of the most uniquely uninhabitable ever discovered. Instead of roasting you or tearing you apart with wind, this planet will fry you with radiation lasers.     This planet’s star which is responsible for this is called a pulsar, a collapsed neutron star revolving 161 times a second.   Pulsars are an extremely interesting phenomenon. Unlike ordinary stars, which emit light and radiation in every direction, pulsars blast almost all their energy out of their north and south poles, creating extremely concentrated “death rays” of radiation.   Because pulsars spin at such an extremely high speed, their entire solar systems are essentially bathed in ridiculous amounts of radiation, enough to kill a human in a blink of an eye.   Not a fun way to go, but a cool one nonetheless.    

  What would life look like on a high gravity planet? Best example, the elcor from Mass Effect:     On a high-gravity planet, a fall can be fatal, so any life would have to be heavily built and quadrupedal (or more), to ensure a stable gait and a low centre of gravity.   High gravity planets would likely have a much thicker atmosphere, so lungs would have to be much stronger to move the air, and hearts would have to be much stronger to pump blood against the greater force of gravity. Veins would probably also have muscles, like our arteries do. Oxygen would likely be much more concentrated, so creatures could become larger.   Flying animals are unlikely on a high-gravity planet, unless the atmosphere is thick enough to support their weight, like whales in water.     Waves on a high gravity planet would be very small, but pack a huge punch. I’m not sure what volcanoes would be like, though they likely wouldn’t erupt until the pressure had reached gargantuan levels,

  How Many People Have Gone To Space? A total of 566 people from 41 different countries have travelled to space , till 9 april 2020. In space travellers have spent 29 thousand days per person. 100 days person of space walking. Astronaut wings awards are given to Astronaut who tarvell above 60 thousand kilometers from erath.  Most of the astronauts have done this because international space station 250 thousand kilometes from earth . A total of 556 person have travelled to space and most of them were americans.  Astronauts need atleast two years of training before going to outer space . Most of the astronausts are Air force pilots . The final landing on moon was on 1972 , and no humans went to moon .

  How Many Constellation Are There? There are 88 constellation in the night sky.They are patterned and made of bright stars. 80 Official recoganized constellation; Latin Name English Name or Description Andromeda Princess of Ethiopia Antlia Air pump Apus Bird of Paradise Aquarius Water bearer Aquila Eagle Ara Altar Aries Ram Auriga Charioteer Bootes Herdsman Caelum Graving tool Camelopardalis Giraffe Cancer Crab Canes Venatici Hunting dogs Canis Major Big dog Canis Minor Little dog Capricornus Sea goat Carina Keel of Argonauts' ship Cassiopeia Queen of Ethiopia Centaurus Centaur Cepheus King of Ethiopia Cetus Sea monster (whale) Chamaeleon Chameleon Circinus Compasses Columba Dove Coma Berenices Berenice's hair Corona Australis Southern crown Corona Borealis Northern crown Corvus Crow Crater Cup Crux Cross (southern) Cygnus Swan Delphinus Porpoise Dorado Swordfish Draco Dragon Equuleus Little horse Eridanus River Fornax Furnace Gemini Twins Grus Crane Hercules Hercules, son of

  Will the sun shine forever?        The Sun shines by turning hydrogen into helium in its core. This process is called nuclear fusion. Fusion happens when lighter elements are forced together to become heavier elements. When this happens, a tremendous amount of energy is created. The famous scientist Albert Einstein discovered a formula which shows how much energy can be created from a small amount of mass. You may have heard of the famous formula E=mc2. E is energy, m is mass, and c is the speed of light. The speed of light is 186,000 miles or 300,000 km per second. So you can see that a tiny amount of matter can be changed into an enormous amount of energy. This can only happen in places which have extremely high pressures and temperatures. At the center of the Sun, the temperature reaches 16 million degrees K, and the pressure is more than a billion times the atmospheric pressure on Earth! The Sun converts about 5 million tons of mass into energy every second. This energy heats t