Space

SECHusker · February 12, 2022

From Elon's presentation on Starship.

SECHusker · February 15, 2022

From the article: "They [SpaceX competitors] are s#!tting the bed,” said a top Washington space lobbyist who works for SpaceX’s competitors and asked for anonymity to avoid upsetting his clients.

https://www.politico.com/news/2022/02/12/elon-musk-space-freaking-out-competitors-00008441

SECHusker · February 17, 2022

On Space Elevators

SECHusker · February 18, 2022

Interview with Jared Isaacman on SpaceX's new all private missions, Polaris. According to Isaacman, in the first mission this year, Polaris Dawn, SpaceX will attempt the first private space walk.

knapplc · March 8, 2022

Asteroid impacts belong in this thread, right?

I wonder how many people have gone over/around these craters without knowing what they were. Pretty cool find, and it would be really cool if they could find the main impact source.

Secondary Cratering Discovered on Earth: The Wyoming Impact Crater Field

Several dozen small impact craters, 10–70-m in size, have been discovered in southeastern Wyoming.

A team of U.S. and German geoscientists found these ancient craters in exposed sedimentary layers from the Permian period (280 million years ago). After discovering the first craters, the team initially suspected that they are a crater-strewn field, formed by the breakup of an asteroid that entered the atmosphere. However, with the discovery of more and more craters over a wide area, this interpretation was ruled out.

Many of the craters are clustered in groups and are aligned along rays. Furthermore, several craters are elliptical, allowing the reconstruction of the incoming paths of the impactors. The reconstructed trajectories have a radial pattern.

“The trajectories indicate a single source and show that the craters were formed by ejected blocks from a large primary crater,” said project leader Thomas Kenkmann, professor of geology at the University of Freiburg, Germany. “Secondary craters around larger craters are well known from other planets and moons but have never been found on Earth.”

Here's a PDF with some more info.