UK /æsˈpe.rɪ.təs/ US /æsˈpe.rɪ.t̬əs/
a type of cloud that forms a thick layer in the shape of waves
The asperitas cloud is among the stars of the World Meteorological Organization’s scarcely published International Cloud Atlas.
[USA Today, 24 March 2017]
dark sunshine noun [U]
UK /ˌdɑːkˈsʌn.ʃaɪn/ US /ˌdɑːrkˈsʌn.ʃaɪn/
a substance thought to exist inside the sun that gives off a special type of light
While scientists continue looking skyward to find more insight into the mysteries of dark matter, some have begun looking to our sun for “dark sunshine.”
[Astronomy magazine, 25 May 2016]
red geyser noun [C]
UK /redˈgiː.zəʳ/ US /redˈgaɪ.zɚ/
a galaxy that contains a large number of very large black holes and where no new stars are able to form
Today, astronomers … are announcing the discovery of a new class of galaxies called “red geysers” that harbor supermassive black holes with winds that have the power to keep dormant galaxies quiet.
[Astronomy magazine, 25 May 2016]