Search results
- A '''supernova''' is an astronomical event that occurs during the last stellar evolutionary [[stages]] of a massive star's life, whose dramatic and [[cata ...ical elements]] produced by [https://en.wikipedia.org/wiki/Nucleosynthesis nucleosynthesis]. Supernovae play a significant role in enriching the interstellar medium w4 KB (616 words) - 02:36, 13 December 2020
- ...created by the [[Big Bang]], and they can be annihilated during stellar [[nucleosynthesis]]. Electrons are produced by [[cosmic]] rays entering the atmosphere and ar3 KB (453 words) - 23:56, 12 December 2020
- ...lements were spread too fast and too thinly in the Big Bang process (see [[nucleosynthesis]]) to form the most stable medium-sized atomic nuclei, like iron and nickel ===Big bang nucleosynthesis===30 KB (4,434 words) - 02:36, 13 December 2020
- The measurement of stellar parallax of nearby stars provides a fundamental baseline in the cosmic dist During the 1990s, the astrometric technique of measuring the stellar wobble was used to detect large [[extrasolar planet]]s orbiting nearby star39 KB (5,838 words) - 23:43, 12 December 2020