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At 7:30 PM, 11 January 2019, at the Sunshine Coast Art Centre, 5714 Medusa St., Sechelt, the Sunshine Coast Centre of the RASC presents Paul Gray, the editor of the RASC Calendar, who will be doing a presentation on Dark Nebulae. A dark nebula or absorption nebula is an interstellar cloud so dense that it obscures the light from objects behind it, such as background stars and emission or reflection nebulae. Interstellar dust grains, coasted with frozen carbon monoxide and nitrogen, in in the coldest, densest parts of larger clouds effectively block the passage of light at visible wavelengths. These clouds are the spawning grounds of stars and planets, and understanding their development is essential to understanding star formation.
The largest dark nebulae, like the Coalsack Nebula and the Great Rift, are visible to the naked eye, appearing as dark patches against the brighter background of the Milky Way.
Admission is free: donations gratefully accepted at the door.