There is gravity in space, but the perception of weightlessness is due to the fact that objects in orbit are in a state of continuous free fall around a larger body, like Earth. This creates the sensation of weightlessness because everything is falling at the same rate. Gravity is what keeps celestial bodies like planets, stars, and galaxies in orbit and is responsible for the formation of the universe as we know it. **

There is gravity in space, but the perception of weightlessness is due to the fact that objects in free fall are in a state of continuous acceleration towards a larger body, such as a planet or star. This creates the sensation of weightlessness for astronauts and objects in orbit around Earth. Gravity is present in space, but the feeling of weightlessness occurs because objects are in a constant state of falling towards a larger celestial body. **

There are several professions in the field of space exploration, including astronauts, engineers, scientists, mission controllers, aerospace technicians, and space vehicle designers. Astronauts are trained to operate spacecraft and conduct experiments in space. Engineers and scientists work on designing and building spacecraft, as well as conducting research on various aspects of space exploration. Mission controllers are responsible for managing and monitoring space missions from the ground, while aerospace technicians are involved in the maintenance and operation of spacecraft and related equipment. Space vehicle designers are responsible for creating the next generation of spacecraft and space exploration technologies. **

Gravity exists because of the mass of objects. The more mass an object has, the stronger its gravitational pull. This force of attraction between objects with mass is what we experience as gravity on Earth. Gravity is what keeps us grounded and holds the planets in orbit around the sun. **

The existence of graviton particles, which are hypothetical elementary particles that mediate the force of gravity, is still a topic of debate in the field of theoretical physics. Some theories, such as string theory, suggest the existence of gravitons, while others, like general relativity, describe gravity as a curvature of spacetime caused by the presence of mass and energy. The search for gravitons and experimental evidence to support their existence is ongoing, and further research is needed to definitively answer this question. **

The reason why planets don't fall down in space when there is no gravity is because they are constantly moving in a straight line at a high speed. This movement creates a centrifugal force that counteracts the force of gravity, keeping the planets in their orbits. Additionally, the planets are also affected by the gravitational pull of the sun, which keeps them in their respective orbits. Overall, it is the combination of these forces that prevents the planets from falling down in space. **

Tesla's anti-gravity technology refers to the concept of using electromagnetic fields to counteract the effects of gravity on an object. This technology is based on the idea that by creating a powerful electromagnetic field around an object, it can be lifted or moved without the need for traditional propulsion methods. While there is speculation and theories surrounding Tesla's work on anti-gravity technology, there is no concrete evidence that he successfully developed a working anti-gravity device. **

No, Russia's space exploration is not at an end. While Russia has faced some challenges in its space program, such as budget constraints and technical issues, it continues to be an active player in space exploration. Russia has a long history of achievements in space, including being the first country to launch a satellite and send a human into space. The country is also involved in international collaborations, such as the International Space Station, and has plans for future missions to the moon and Mars. Therefore, Russia's space exploration is far from over. **