🚀Astronomy and Space 🛸

The sun The Sun is the star at the center of the Solar System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core. The Sun radiates this energy mainly as light, ultraviolet, and infrared radiation, and is the most important source of energy for life on Earth. • Surface temperature: 5,772 K • Distance to Earth: 149.6 million km • Radius: 696,340 km • Age: 4.603 billion years • Mass: 1.989 × 10^30 kg • Gravity: 274 m/s² • Spectral type: G2V Hottest part core The hottest part of the Sun is its core, where temperatures top 27 million degrees Fahrenheit (15 million degrees Celsius). Location The Sun is located in the Milky Way galaxy in a spiral arm called the Orion Spur that extends outward from the Sagittarius arm. The Sun orbits the center of the Milky Way, bringing with it the planets, asteroids, comets, and other objects in our solar system. Radiation Solar radiation, often called the solar resource or just sunlight, is a general ...

  Black Hole A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. Who introduced black hole? A black hole is a volume of space where gravity is so strong that nothing, not even light, can escape from it. This astonishing idea was first announced in 1783 by John Michell, an English country parson. What is a black hole introduction for kids? Nothing is darker than a black hole. A black hole is an area of such immense gravity that nothing—not even light—can escape from it. Black holes form at the end of some stars' lives. The energy that held the star together disappears and it collapses in on itself producing a magnificent explosion. Can you explain a black hole? Black holes are regions in space where an enormous amount of mass is packed into a tiny volume. This creat...