A Guide to Astronomical Terms
Welcome to the Cosmic Lexicon, your portal to understanding the wonders of the universe. Here, we demystify the celestial vocabulary that describes everything from distant galaxies to the fundamental particles of existence.
A vast cloud of gas and dust in interstellar space, often the birthplace of stars. Nebulae can glow with their own light or reflect light from nearby stars, appearing as beautiful, diffuse patches in the night sky.
A region of spacetime where gravity is so strong that nothing, not even light, can escape. Formed from the collapse of massive stars, black holes are some of the most mysterious and powerful objects in the cosmos.
Extremely luminous active galactic nuclei, powered by supermassive black holes at the centers of distant galaxies. Quasars can outshine their entire host galaxies, making them visible across vast cosmological distances.
A planet that orbits a star outside our solar system. The discovery and study of exoplanets have opened up new avenues in the search for life beyond Earth and understanding planetary formation.
A powerful and luminous stellar explosion. This transient astronomical event occurs during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion. It briefly outshines an entire galaxy.
The faint afterglow of the Big Bang, a nearly uniform thermal radiation filling the universe. It provides crucial evidence for the Big Bang theory and offers insights into the early universe's composition and structure.
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