Steve noun [U]
the nickname for a recently discovered natural appearance of purple lights in the sky, similar to the aurora borealis and aurora australis
Featuring an elongated purple stream and sometimes a green, picket fence-like structure, this odd illumination can be seen lingering at latitudes far lower than typical aurorae. Bemused space physicists couldn’t ascertain whether the entity was a genuine aurora, albeit a weirdly shaped one, or something else entirely. Now, research suggests that perhaps neither answer is correct: Steve could instead be an electrical hybrid.[www.nationalgrographic.com, 3 May 2019]
Goldilocks star noun [C]
UK /ˈgəʊl.dɪ.lɒks.ˌstɑːʳ/ US /ˈgoʊl.di.lɑːks.ˌstɑːr/
a type of star that astronomers consider has exactly the right combination of features to support life
Astronomers want to know which stars are the most likely to have habitable planets. These stars can be thought of as Goldilocks stars that are just right – at least in some ways – for potentially life-supporting planets. … A new peer-reviewed study published in The Astrophysical Journal Letters … might help to narrow down the search for Goldilocks stars.
[earthsky.org, 17 March 2019]
space grease noun [U]
a particular type of matter found in space made up of molecules of carbon with a greasy consistency
A team of eight scientists recreated and analyzed material similar to interstellar dust, and used it to estimated how many grease-like carbon molecules … are in interstellar space, beyond the bounds of our solar system. The estimated amount of “space grease” in the Milky Way far exceeded expectations: 10 billion trillion trillion tonnes – or enough to fill 40 trillion trillion trillion packs of butter.
[www.cnn.com, 28 June 2018]