After getting its Crew Dragon capsule successfully to the ISS (International Space Station) and back, SpaceX has moved its focus to the interplanetary Starship (one more enormous project). In a post, Elon Musk showed off trials on the heat shield of Starship. It is the section that will keep it from catching fire when it coming back to Earth. The blow-torch-akin devices conveyed the temperatures almost 1,650 Degrees Kelvin (2,500 Degrees F) at the white-hot & most extreme areas. This is sufficient to stand the heat of re-entry in the orbit, Musk claimed to the media.
Musk posted that the tiles are shaped hexagonal since that offers “no straight path for hot gas to pace via the cracks.” The tiles will be set up towards the direction of re-entry on windward side, “with no requirement of shield on the leeward side.”
The hottest areas will consist of a “transpiration cooling” system, having microscope pores on the outer side. This will allow methane or water to come out and cool the outer surface. That might allow the Starship to get back to service soon after a flight and lower the damage on the heat shields merely by refilling the reservoir of heatshield. “Transpiration cooling will be included wherever we see shield’s erosion,” Musk claimed in the post. “Starship requires being ready to fly again instantly after landing,” he added.
On a related note, National Geographic and Fox have concluded their inquiry into Neil deGrasse Tyson over supposed sexual misconduct, and have made a decision to offer both StarTalk and Cosmos: Possible Worlds the go-ahead. While the channels did not disclose their findings (they have “no additional comment”), they now hope to discover a new date for airing of Cosmos after a last-minute postpone and will get back to Nat Geo’s rest of the 13 StarTalk episodes in April 2019.