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  • Umm, akshually. The Martian atmosphere is already 95℅ CO2. Its cold because the atmosphere is so thin. Its thin because Mars does not have a strong magnetic field like Earth does, so solar winds can strip away bits of the atmosphere. Also, Mars only has about 0.38 times the gravity of Earth, making it easier for gases to escape.

  • Europe faces an unusual problem: ultra-cheap energy
  • A power companies largest expense is maintaining the grid. If their only product has to be sold at negative prices, then there is no money to pay people to maintain the grid. An under maintained gridgrid can lead to very serious consequences, ref:Texas.

  • MacBook Air owner?
  • "Not as shit as you could be" is not something we should be praising. A handful of years is still too short, just because it is marginally better than their competitors doesn't mean we should give Apple a pass. It just means that the industry is full of shitty companies that profit off of producing e-waste, and know that consumers have no real choice but to put up with it.

  • Windows Users Can't Seem to Blame Windows For Its Own Problems (clip from Destination Linux 179) - by Michael Tunnell (TuxDigital), Published on June 10, 2020
  • I've had this same conversation I don't know how many times, but about phones. Someone tells me they don't like Android because its slow and buggy, and iPhone is so much better. Then I ask them which Android phone(s) they've tried and its always a loaner that is a cheap, entry level phone and/or it is used and years out of date. So of course a brand new iPhone is going to be a better experience. They don't seem to understand that there are premium phones that use Android.

  • Which are your preferred laptops?
  • A "factory seconds" framework 13 might fit your budget, and you get a laptop that is easily repairable and upgradeable. The 11th gen i7 version that starts at $500 is what I have been using for a couple of years now and still runs great.

    They also have refurbished laptops, but those seem to start a little bit more expensive.

  • Massive explosion rocks SpaceX Texas facility, Starship engine in flames
  • What you're talking about is usually referred to as a de-orbit burn. Sure somebody could call it a reentry burn, but not SpaceX. What SpaceX calls a reentry burn is the maneuver when a Falcon 9 booster lights its engines as it first hits the atmosphere to slow down and move the heating away from it's body. Neither the super heavy booster nor the ship make a maneuver like this.

    IFT3 did not make a de-orbit burn, and there is not one planned for IFT4 either.

  • Massive explosion rocks SpaceX Texas facility, Starship engine in flames
  • IFT3 was technically suborbital, but only barely. Like a couple hundred km/h short. Literally a couple of seconds longer second stage burn would have put it into a stable orbit. Or the same velocity just with a lower apogee. They intentionally left the perigee just inside the atmosphere so a deorbit burn was not required. This is also the plan for IFT4, iirc. I think they are talking about the bellyflop/suicide burn. It was not planned on IFT3, but is for IFT4.

    Both the booster and the ship have attitude control thrusters that you could see firing during the live stream of IFT3. Early prototypes used nitrogen cold-gas thrusters, but were planned to be upgraded to methane/oxygen hot-gas thrusters at some point. I don't recall if/when they were.

  • Massive explosion rocks SpaceX Texas facility, Starship engine in flames
  • the explosion, which took place at its Boca Chica Starbase facilities

    The raptor testing stand at McGregor experienced an anomaly

    Well, which is it? I'm going to trust NASASpaceflight over this article and go with it was a McGregor. No where near Starbase. And that means it will likely have no effect on IFT4 as this article says.

    edit: Adding to this, the author of this article has no idea what they are talking about.

    The Raptor engines that are currently undergoing testing are SpaceX’s Raptor 2 engines

    So clearly nothing to do with IFT4, as Ship 29 and Booster 11 are already outfitted with their engines, non of which are Raptor 2s.

    On its last flight test, IFT-3, Starship finally reached orbital velocity and it soared around Earth before crashing down into the Indian Ocean. On the next flight, SpaceX aims to perform a reentry burn, allowing Starship to perform a soft landing in the ocean.

    IFT3 burned up on reentry, maybe parts of it made it to the ocean, but it was not crashing into the ocean that was the problem. IFT4 does not plan on doing a reentry burn. No one does a reentry burn from orbit. Starship uses a heat shield like every other orbital space craft. They are planning to attempt a landing burn, that is probably what they are talking about.

  • InitialsDiceBearhttps://github.com/dicebear/dicebearhttps://creativecommons.org/publicdomain/zero/1.0/„Initials” (https://github.com/dicebear/dicebear) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)RI
    rImITywR @lemmy.world
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