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 does not extradite North Korean refugees to North Korea. Russia is a signatory to the 1951 Refugee Convention and its 1967 Protocol, which prohibits the refoulement of refugees to their home country where they may face persecution. As a result, Russia generally provides protection to North Korean refugees and does not send them back to North Korea. However, the situation for North Korean refugees in Russia can still be difficult, as they often face challenges in obtaining legal status and may be at risk of deportation to third countries. **

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. **

The North Sea is not called the North Ocean because it does not meet the criteria to be classified as an ocean. Oceans are larger and deeper bodies of saltwater that cover a significant portion of the Earth's surface, while the North Sea is a relatively small and shallow sea located between the United Kingdom, Norway, Denmark, Germany, and the Netherlands. Additionally, oceans are typically separated by continents, while the North Sea is connected to the Atlantic Ocean. Therefore, the North Sea is appropriately named a sea rather than an ocean. **

One popular PC game about space exploration is "Elite Dangerous." In this game, players can explore a realistic 1:1 scale open-world galaxy, trade goods, mine resources, engage in combat, and more. The game offers a vast and immersive experience for players interested in space exploration and simulation. "Elite Dangerous" has received positive reviews for its attention to detail and expansive gameplay options. **

Space probes are sent on exploration missions using powerful rockets that launch them into space. These rockets provide the necessary thrust to escape Earth's gravity and propel the probe towards its destination. Once in space, the probe's trajectory is carefully calculated to ensure it reaches its target planet or celestial body. The probe is equipped with various instruments and communication systems to collect data and send it back to Earth. **

The defining moments of space exploration include the launch of the first artificial satellite, Sputnik 1, by the Soviet Union in 1957, which marked the beginning of the space age. The Apollo 11 mission in 1969, when humans first set foot on the moon, was another defining moment that captured the world's imagination. The launch of the Hubble Space Telescope in 1990 allowed us to see deep into the universe and revolutionized our understanding of space. More recently, the successful landing of the Mars rover Perseverance in 2021 has opened up new possibilities for exploring the red planet. **

No, it is not possible to create gravity in space. Gravity is a fundamental force that is caused by the presence of mass. In space, there is no atmosphere or solid surface to generate gravity, so it cannot be artificially created. However, objects with mass will still exert gravitational force on each other in space, following the laws of physics. **