HL Tauri dust rings with gaps imaged by the ALMA array. ALMA (ESO/NAOJ/NRAO) 2014
We can interpret this amazing image of a forming solar system (HL Tauri, from the Alma array; ESO 2014).
Iron meteorites with #taenite and #kamacite domains forming a Widmanstätten pattern tell us that in systems like this or our own solar system […]
[Original post on fosstodon.org]
An impromptu photo of a slab of the Tambo Quemado iron meteorite (Peru) with a Canadian quarter for scale (23.9mm). The meteorite shows the Widmanstätten pattern.
Figure 1 from John Wood's 1964 Icarus paper showing the increase in the taenite-kamacite two-phase field with decreasing temperature. It also shows the idealized Widmanstätten pattern at two temperatures.
The solid-state diffusion of iron and nickel into #taenite and #kamacite domains forms the Widmanstätten pattern in iron meteorites. The growth of these domains has been calibrated with temperature.
The meteorite pictured (Tambo Quemado, Peru, type IIIB) […]
[Original post on fosstodon.org]
