emission category
121Crab Nebula — Crab Nebula …
122Messier 82 — Observation data (J2000 epoch) Constellation Ursa Major …
123Wolf-Rayet star — Wolf Rayet stars (often referred to as WR stars) are evolved, massive stars (over 20 solar masses), which are losing mass rapidly by means of a very strong stellar wind, with speeds up to 2000 km/s. While our own Sun loses approximately 10−14 of… …
124Mitigation of global warming in Australia — Main article: Climate change in Australia Mitigation of global warming involves taking actions to reduce greenhouse gas emissions and to enhance sinks aimed at reducing the extent of global warming. This is in distinction to adaptation to global… …
125astronomy — /euh stron euh mee/, n. the science that deals with the material universe beyond the earth s atmosphere. [1175 1225; ME astronomie ( < AF) < L astronomia < Gk. See ASTRO , NOMY] * * * I Science dealing with the origin, evolution, composition,… …
126Wolf–Rayet star — Hubble Space Telescope image of nebula M1 67 around Wolf–Rayet star WR 124 Wolf–Rayet stars (often referred to as WR stars) are evolved, massive stars (over 20 solar masses initially), which are losing mass rapidly by means of a very strong… …
127Climate change policy of the United States — The politics of global warming is played out at a state and federal level in the United States. Part of the Politics series Politics …
128Mitigation of aviation's environmental impact — Emissions from aviation are continuing to grow despite advances in aircraft efficiency. Currently 2% of global emissions are created by the aviation industry. Aviation has an impact on the environment due to aircraft engines emitting noise,… …
