The universe is unimaginably vast, stretching billions of light-years across. From the scorching surface of the Sun to the frigid vacuum of interstellar space, the scale is mind-boggling. Our solar system, with its planets, moons, and asteroids, is just a tiny speck within the Milky Way galaxy, which itself is one of billions of galaxies in the observable universe.
Astronauts have shared eerie experiences, like the strange itchiness on their faces or knocking sounds in space. The cosmic microwave background, a relic from the Big Bang, reveals the universe's early history. Dark matter and dark energy, still mysterious, shape the cosmos.
From black holes to neutron stars, from the Big Bang to the possible Big Crunch, the universe holds countless wonders. This article explores key facts about space, the temperature of the cosmos, and the laws of physics that govern it all.