The spacecraft that astronauts go into is called a spacecraft. That being said, if the rocket returns to Earth again, it would be a complete mistake. Because rockets and spacecraft are two different things. Rockets follow Newton's third law to help launch any satellite or spacecraft. On the other hand, it is a space craft in which astronauts sit and go into space.
There are usually two ways to go from Earth to space. The first is when a satellite robot is sent into space. Then there is no need to bring it back to earth. For this, only rockets are used to take the satellite into space. This rocket is surrounded by a booster. Which helps it to rise above the earth. Gradually as it rises all the lessons of the rocket become different and at the end there is only the satellite and it continues to orbit in its orbit. These rockets become completely separate in space. That means they never come back to earth.
The second is that spacecraft are used to transport people to space or to take people into space. Space craft is usually like an airplane. In which there is a complete arrangement for space passengers to stay, sleep, eat and drink. The front of the spacecraft has all the controlling systems. From where asteroids or astronauts can control everything. This spacecraft is connected by two booster rockets and a main engine rocket. The boost rocket helps lift the rocket out of Earth's gravity, and when it runs out of fuel, the rocket separates from the two engines.
Work began again on the main rocket. This rocket has the full responsibility of taking the spacecraft into space. When the spacecraft reaches space, it's time to separate the main rocket from the spacecraft, and that's where the spacecraft's journey begins. The spacecraft can be operated by asteroids just like an airplane. It has all the components and machines of advanced technology. With the help of which astronauts can easily complete experiments and research.
After space research, it's time for them to return to Earth. The spacecraft continues to revolve around the earth and can slowly enter the earth's atmosphere. After entering the Earth's atmosphere, the spacecraft faces upwards, not downwards. This is because the spacecraft has to face strong bell pressure when it enters the Earth's atmosphere. The friction of the wind can cause the spacecraft to catch fire and burn. If this spacecraft did not have special heat-resistant protection, it would have faced huge problems.
If for some reason this protection is torn or damaged, the spacecraft will burn to ashes. Slowly the spacecraft becomes parallel as it moves closer to Earth and then lands on the airport runway like a Hawaiian ship. After the plane landed on the runway, the wheel of the spacecraft came out. But it weighs a lot more when it lands. That is why after landing, the parachute opens from the back and can land very easily. In this way, the astronauts reach the earth safely.
This spacecraft is reusable. Which means it can be used again. It is equipped with two boost rockets and a main rocket to send the spacecraft back into space. Now a question may arise in your mind, where does so much fuel come from in this spacecraft that can travel in space and come back to earth again. So the answer to all these questions is the International Space Station.
From time to time food, necessary machines and fuel are sent to the International Space Station for the astronauts through science and from there the astronauts get all the necessary things. By now you may have realized that it is not the rocket from space but the spacecraft that comes back to earth and the astronauts go into space through the spacecraft. But a news article a few days ago revealed that Elon Musk, owner of SpaceX, a private company, said a few months ago that their scientists had built a reusable rocket. This means that from now on, after placing the satellite in space orbit, the rocket will be able to return to Earth, but this work will still take some time to complete.
As tempting as the logic may be, rockets don't work by “pushing against the air,” since they also function in the vacuum of space. Instead, rockets take advantage of momentum, or how much power a moving object has.
If no outside forces act on a group of objects, the group's combined momentum must stay constant over time. Imagine yourself standing on a skateboard with a basketball in your hands. If you throw the basketball in one direction, you and the skateboard will roll in the opposite direction to conserve momentum. The faster you throw the ball, the faster you roll backward.Rockets work by expelling hot exhaust that acts in the same way as the basketball. The exhaust's gas molecules don't weigh much individually, but they exit the rocket's nozzle very fast, giving them a lot of momentum. As a result, the rocket moves in the opposite direction of the exhaust with the same total oomph.Rockets work by expelling hot exhaust that acts in the same way as the basketball. The exhaust's gas molecules don't weigh much individually, but they exit the rocket's nozzle very fast, giving them a lot of momentum. As a result, the rocket moves in the opposite direction of the exhaust with the same total oomph.Rockets make exhaust by burning fuel in a rocket engine. Unlike airplanes' jet engines, rockets are designed to work in space: They don't have intakes for air, and they bring along their own oxidizers, substances that play the role of oxygen in burning fuel. A rocket's fuel and oxidizer—called propellants—can be either solid or liquid. The space shuttle's side boosters used solid propellants, while many modern rockets use liquid propellants.