The exponential increase in plastic production from a mere two million tons in 1950 to over 450 million tons annually today represents a dire environmental crisis requiring immediate action.
"A fresh, icy crust hides a deep, enigmatic ocean. Plumes of water burst through cracks in the ice, shooting into space. An intrepid lander collects samples and analyses them for hints of life."
We’re back with#formation and #demographics this morning starting with Charles Law on embedded planets.
Charles stresses how much #ALMA has revolutionised the field providing a wonderful pictures of discs. Nevertheless, resolving planets embedded in these discs is pretty hard. But chemistry is our saviour, making signatures of the planet observable with #ALMA.
We start with the disc HD 169143 b - funny I worked with data from this disc for my bachelor’s thesis.#ExSSV
Next up, we’ve got Kiersten Boley on the first evidence of the metallicity cliff in the formation of super-Earths.
The first stars were metal poor, so there were not enough metals to form planets via core accretion. So the question comes up: when did we start forming planets?
Already back in 1996, after finding 4 planets, people started doing statistics ;) in particular looking at how metallicity links to #planet#formation.
We’re back with direct imaging with Masayuki Kuzuhara.
They used the #Subaru#telescope to observe nearby accelerating stars and search for substellar companions.
They discovered 4 substellar companions, one of which is the brown dwarf HIP 21152 B. The spectrum reveals water and methane. They further modelled the orbit, giving them a dynamical mass of around 28 Mjup.#ExSSV
Featuring a #JWST infrared image of the Orion Bar, which separates parts of the Orion Nebula containing cool molecular gas (lower left) from those containing hot plasma (upper right). The latter are ionized by ultraviolet radiation from massive #stars (located beyond the image). The strong ultraviolet radiation field heats protoplanetary disks around young stars in this region, dispersing the gas needed for #planet formation.
악마와의 토크쇼 다시'보기 (PLANET OF'2024영화jp!)-ow전체보기 - IMDb (www.imdb.com)
악마와의 토크쇼 다시'보기 (PLANET OF'2024영화jp!)-ow전체보기