What happened when the Asteroid hit earth?
An asteroid is a small rocky body orbiting the Sun. Millions of asteroids lie in the asteroid belt between Mars and Jupiter.
The asteroid which hit Earth almost 65 million years ago is considered to be the sole reason behind the extinction of dinosaurs.
The force with which an asteroid hits the Earth is not the only problem. The dust and smoke, which rise in the atmosphere after the impact, block the sunlight, resulting in the lowering of overall temperature and eventually leading to the death of a number of species.
If an apartment sized asteroid were to hit Earth, then it would probably wipe out a small city.
If a 20 storied building sized asteroid were to hit Earth, then it might completely flatten a small country.
What happened if sun is disappeared....
The sun's enormous mass and gravitational power locks the planets in their orbits. If the sun disappeared, the earth would fly off in a straight line into space. Earth would collapse into darkness only after 8 minutes, as sunlight hakes about 8 minutes to reach earth. The Moon would disappear as it doesn't produce light of its own. Plant would die, as no sunlight means no photosynthesis Within a week, earth's temperature would drop below degrees Fahrenheit, dropping to negative 100 degree Fahrenheit within a year, making it impossible for us to survive. Ocean surfaces would freeze, however, water in the interior would stay liquid, due to heat from the Earth's core. Only microorganisms, who don't require photosynthesis, would survive by converting the core's heat into the energy they need. Thus, without the sun, human wouldn't exist.
If a Black hole entered our solar system then what happened......
Firstly, black hole's gravity will cause complete chaos in our Solar System. Orbits of Planets as well as Comets will be significantly altered. Initially, comets and meteorites might start hurtling towards us. Later, even the planets might start colliding with each other.
Secondly, even if a gigantic planet like Jupiter comes in the path of the Black hole, it will be devoured.
Thirdly, if the Black hole comes near Earth, initially it's intense gravitational pull will cause devastating earthquakes and volcanoes. When the Black hole reaches our orbit, there will be nothing left but an uninhabitable magma-laden rock.
Lastly, our Sun might offer some resistance to start with.
A gravitational tug of war might ensue. But eventually, even our beloved Sun will be ripped apart to pieces.
Pluto is not a part of solar system why....
Pluto was discovered by Clyde Tombaugh in 1930. It is not considered a planet anymore because in 2006, astronomers of IAU (International Astronomical Union) gave a new definition to the word 'planet'. According to the new definition, a planet is a celestial body, which is in orbit around the sun, is spherical, and it has cleared the neighborhood around its orbit.
What does this mean?
It basically means that using its gravity, a planet should have removed asteroids and dwarf planets, out of its path, thus cleared its neighborhood.
Now, Pluto is in orbit around the sun and is spherical. But since Pluto's neighborhood has many other objects, and it has not cleared its neighborhood. It is not called a planet anymore.
If Jupiter is disappeared....
As per Roman Mythology, Jupiter is the god of thunder, lightning and storms. It is the largest planet in our solar system, and its mass is about 2.5 times the total combined weight of all the other planets in our solar system.
Now, if Jupiter would have never existed, it is safe to say that even we would not have existed. This is because some scientists believe that during the initial stages of the formation of our solar system, Jupiter's inward migration towards the sun and then subsequent outward migration away from the sun and towards Saturn played a vital role in the formation of Mercury, Venus and Earth. Also, since ages, Jupiter has been protecting earth from collisions with large asteroids and comets. Lastly, more than 70 moons of Jupiter would have wandered along the solar system as orphans.
Why is it difficult of landing in Mars?
Before Mars, we successfully landed on earth and moon. Earth has a thick atmosphere. So, the advantage in this case is that we can use parachutes to slow down the spacecraft. While, the disadvantage is that the thick atmosphere creates frictional heating, thus requiring heat shields. Now, as the moon has no atmosphere, the disadvantage is that parachutes don't work, hence we need complex retro rockets. But the advantage is that no atmosphere means no friction, so no need of heat shields.
Now, more than 50% of landings on Mars have failed because we face both the above disadvantages here. This is because Mars atmosphere is 100 times thinner than Earth's atmosphere. So, parachutes are ineffective. Hence, we need complex retro rockets. Also, as the atmosphere is not completely absent, we need heat shields. As a result, the complexity of landing on Mars increases.
How we have round earth?
Why are planets round?
Planets are round because of the force of gravity.
Gravity acts as if it originates from the center of a planet and pulls each point of the planet towards it.
Hence, the only way for everything on the surface to be equally close to its center is to form a round shape. However, planets are not exactly round. They are roughly spherical. This is because planets spin on their axes. Just like a spinning top, right? Absolutely.
When planets spin, things near the equator tend to move away from the center due to centrifugal force, resulting in formation of an equatorial bulge. Because of this bulge, the equator of a planet becomes farther from its center than its poles, creating a roughly spherical planet.
Why earth doesn't have ring?
The rings of Saturn can be remnants of a moon, comet, etc., that got ripped apart due to Saturn's gravitational pull, or the result of a large collision between two moons. Some even claim that rings are made up of debris left over during the formation of our solar system.
So, how did this debris form Saturn's rings?
It's got to do with Roche limit. It is the distance at which objects tend to be ripped apart by the planet's gravitational pull. In case of Saturn, it is popularly believed that a celestial body like moon or comet got too close to it and exceeded the Roche limit. Hence, it got ripped apart into pieces, thus forming its rings. Now, earth also has a moon. But since it is beyond the Roche limit, it doesn't get ripped apart into pieces to form rings.
Ha Ha Haaaaaaaaaaaaa
What if we had rings like Saturn?
Firstly, if we had rings like Saturn, people may keep on colliding with each other.
Secondly, if we had rings like Saturn, Saturn would probably not like this, it may give away its rings.
Thirdly, if we had rings like Saturn, sleeping on the bed will not be possible anymore, like Horses, people may have to get used to standing and sleeping.
Fourthly, animals are very proud of their big claws, sharp teeth and strong horns, if we had rings like Saturn, even they might start ordering rings.
Fifthly, if we had rings like Saturn, some people may cover their rings with gold, their rings will not be safe anymore.
Lastly, if we had rings like Saturn, some people may get obsessed with their rings, they may keep on cleaning them all day long.
What if the Earth Disappeared?
Firstly, if Earth disappeared, people may suddenly start buying houses on Mars.
Secondly, if Earth disappeared, people may have to get used to living in space for a long time.
Thirdly, if Earth disappeared, sale of space suits would skyrocket.
Fourthly, if Earth disappeared, using money to get favor would not be possible anymore.
Lastly, if Earth disappeared, the Moon would have to find a different planet to rotate around.
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