Re: SPACE - random thread about space stuff
Posted: Tue Dec 22, 2020 1:57 am
That is not dead which can eternal lie, and with strange aeons bring us some web forums whereupon we can gather
http://www.octopusoverlords.com/forum/
Starship SN9 is currently tracking an early New Years’ launch, providing the upcoming test series clears the path for what will be a similar flight to SN8, albeit aiming for a “softer” landing.
With the vehicle on the launch mount, the first test will involve cryoproofing as early as Monday, ahead of a three engine Static Fire test. Should the trio of Raptors – and their silver ringed host – perform as expected, a 12.5 KM test flight could come as soon as the first or second week of January.
Launching rockets is hard. Most of the time we get it right, but sometimes unexpected things happen. Perhaps it's because of a stage failure or perhaps it's because of using a daring prototype, like SpaceX's Starship. But, as devastating as a failure can feel, it can help the teams behind these launches to learn and grow, helping them to continue to improve spaceflight.
Below is a list of the craziest rocket explosions and failures of 2020 (not including situations where a rocket had an anomaly en route but was still able to reach orbit (such as SpaceX's Falcon 9 Starlink rocket launch of March 18) or the numerous launch aborts of 2020 due to situations like weather or technical issues).
Technically, the Quadrantids meteor shower began last year—December 28, 2020, to be specific—but they peak tonight. And what’s so special about these meteors? In addition to being the first of the year, they’re also some of the best, according to NASA, thanks to coming in swiftly (at a rate of 60 to 200 meteors per hour), and because they are bright fireballs that often come colorful trails.
Occam's Razor does a blow by.
With Starship SN8’s test flight still fresh in the memory, SN9 is set to complete an accelerated pad flow with a Static Fire test and launch this coming week. A triple Raptor Static Fire test is tracking early this week. Pending acceptable test results, the launch of SN9 could take place just a few days later.
Meanwhile, Starship SN10 is now an integrated stack inside the High Bay, ready to roll to the launch site as soon as SN9 departs. SN11 and SN12 are undergoing their own buildup operations inside the Mid Bay, with the former only lacking a nosecone.
Awesome. It really was a good year for spaceflight.raydude wrote: ↑Mon Jan 04, 2021 4:46 pm 2020 Space Exploration. A Year in Review.
Btw, I have previously said that I consider SpaceX rockets the equivalent of space taxis. That makes their contribution no less spectacular nor important. I am moved to tears every time I see their launches. To them and to everyone exploring space I wish good luck and Godspeed in 2021.
It was a germs thing, you don't want your Apollo astronaut catching a cold and then being stuck for ten days in a vehicle with interior space the size of a minivan. Remember Apollo 13? How one of the astronauts had a bad head cold? Imagine all three of them sick .Daehawk wrote: ↑Mon Jan 04, 2021 9:28 pm In the old videos of the Apollo era I thought they had the astronauts dress and hook up air in a sealed clean room and wear their sealed suits and helmets out and then to and into the rocket. These guys had no helmet mask on and their head out the car window. Thought it was a germs thing. Guess not.
Plus what would happen if they passed the flu on to Kubrick?jztemple2 wrote: ↑Mon Jan 04, 2021 10:08 pmIt was a germs thing, you don't want your Apollo astronaut catching a cold and then being stuck for ten days in a vehicle with interior space the size of a minivan. Remember Apollo 13? How one of the astronauts had a bad head cold? Imagine all three of them sick .Daehawk wrote: ↑Mon Jan 04, 2021 9:28 pm In the old videos of the Apollo era I thought they had the astronauts dress and hook up air in a sealed clean room and wear their sealed suits and helmets out and then to and into the rocket. These guys had no helmet mask on and their head out the car window. Thought it was a germs thing. Guess not.
Get those tissues ready, we have another launch this Thursdayraydude wrote: ↑Mon Jan 04, 2021 4:46 pm 2020 Space Exploration. A Year in Review.
Btw, I have previously said that I consider SpaceX rockets the equivalent of space taxis. That makes their contribution no less spectacular nor important. I am moved to tears every time I see their launches. To them and to everyone exploring space I wish good luck and Godspeed in 2021.
SpaceX plans to get even more ambitious with its pinpoint rocket landings.
Elon Musk's company routinely recovers and reuses the first stages of its Falcon 9 and Falcon Heavy rockets, bringing the boosters down for soft vertical landings about 9 minutes after liftoff on ground near the launch pad or on autonomous "drone ships" in the ocean.
These touchdowns are impressively precise. But SpaceX aims to achieve something truly mind-blowing with Starship, the next-generation system the company is developing to take people and payloads to the moon, Mars and other distant destinations.
"We’re going to try to catch the Super Heavy booster with the launch tower arm, using the grid fins to take the load," Musk said via Twitter on Dec. 30.
That's right: SpaceX wants to bring Super Heavy, the giant first stage of the two-stage Starship system, down directly on the launch stand.
That's pretty cool.
It's a cosmic roll of the dice. There's no doubt that a major asteroid or comet strike could cause extensive devastation and profoundly affect life on Earth.
The largest hit in recent times was the object that exploded over Tunguska, Siberia, in June 1908 with an energy impact of five to 15 megatons. Then there was that spectacular and destructive airburst in February 2013 over the Russian city of Chelyabinsk. The Chelyabinsk explosion generated a shock wave that shattered windows on the ground, and the resulting flying glass shards injured more than 1,000 people.
While these run-ins are few and far between, those in the know call them wakeup calls.
Thwarting an incoming object that has Earth in its crosshairs will mean deflecting or disrupting the hazardous object. That's a task of planetary defense, an "applied planetary science" to address the near-Earth object (NEO) impact hazard.
Lindley Johnson is NASA's Planetary Defense Officer and program executive of the Planetary Defense Coordination Office. An email from him includes the on-the-job line: "Hic Servare Diem," Latin for "Here to Save the Day."
Space.com caught up with Johnson to discuss recent events and what's on the planetary-defense agenda in the coming year.
I actually got to meet Lindley Johnson back in 2014 when he was the NEO Programs Exec. I was in my 2nd year at APL and I was on the Balloon Observing Platform for Planetary Science (BOPPS) mission. It was a way for NASA to rapidly deploy sensors to view space objects that had only recently been discovered, i.e. asteroids and comets using high altitude balloons carrying a telecope with an IR camera. Stuff that would be out of viewing range in the time it takes to put together a rocket and payload, since putting together a balloon mission was much faster.jztemple2 wrote: ↑Tue Jan 05, 2021 3:17 pm A conversation with NASA's Planetary Defense Officer: Defending Earth against dangerous asteroids: Q&A with NASA's Lindley Johnson
Excerpt:It's a cosmic roll of the dice. There's no doubt that a major asteroid or comet strike could cause extensive devastation and profoundly affect life on Earth.
The largest hit in recent times was the object that exploded over Tunguska, Siberia, in June 1908 with an energy impact of five to 15 megatons. Then there was that spectacular and destructive airburst in February 2013 over the Russian city of Chelyabinsk. The Chelyabinsk explosion generated a shock wave that shattered windows on the ground, and the resulting flying glass shards injured more than 1,000 people.
While these run-ins are few and far between, those in the know call them wakeup calls.
Thwarting an incoming object that has Earth in its crosshairs will mean deflecting or disrupting the hazardous object. That's a task of planetary defense, an "applied planetary science" to address the near-Earth object (NEO) impact hazard.
Lindley Johnson is NASA's Planetary Defense Officer and program executive of the Planetary Defense Coordination Office. An email from him includes the on-the-job line: "Hic Servare Diem," Latin for "Here to Save the Day."
Space.com caught up with Johnson to discuss recent events and what's on the planetary-defense agenda in the coming year.
"Mannequin Skywalker" will fly to space Thursday (Jan. 14) as part of a big test for Blue Origin's budding human spaceflight program — and you can watch the event live.
The company's New Shepard rocket and space capsule are expected to lift off at 10:45 a.m. EST (9:45 a.m. local time or 1545 GMT) from the company's West Texas facility to evaluate upgrades to the crew capsule's performance. You can watch it live here on Space.com, courtesy of Blue Origin, or directly via the company's website here. Coverage will start 30 minutes before launch, and the company will provide live updates on Twitter.
Blue Origin just took another big step toward human spaceflight.
The company, which is run by Amazon.com founder Jeff Bezos, launched its first upgraded New Shepard spacecraft for astronauts, the RSS First Step, on an uncrewed suborbital test flight from West Texas today (Jan. 14).
"The success of this flight puts us one really big step closer to flying astronauts," said Blue Origin's Ariane Cornell, director of astronaut and orbital sales, during a live webcast. "There's going to be a lot of fun ahead in 2021."
New Shepard lifted off at 12:18 p.m. EST (1718 GMT), and its two elements — a rocket and a capsule, both of which are reusable — aced their landings shortly thereafter. The booster came down for a powered, vertical touchdown in its designated landing zone near the launch pad, and the capsule then settled down softly under parachutes a short distance away, raising a plume of desert dirt about 10 minutes after liftoff.
The New Shepard capsule reached a maximum altitude of 350,827 feet (106,932 meters), according to Blue Origin. That's about 66 miles (107 kilometers) up, above the traditionally recognized 62-mile (100 km) border of space.
NASA will attempt to fire the engines on its Space Launch System (SLS) megarocket for the first time today and you can watch the fiery action live online.
As part of a critical test before the rocket behemoth lifts off for the first time, the agency plans to ignite the four main engines on its heavy-lift core booster this at about 5 p.m. EST (2200 GMT) today, Jan. 16. The test, which is designed to simulate the core stage's performance during launch, will take place at the agency’s Stennis Space Center, in Mississippi.
You can watch the test live here and on the Space.com homepage, courtesy of NASA, beginning at 4:20 p.m. EST (1920 GMT). You'll also be able to watch the test directly from NASA here.
I suspect that there will be some horse trading regarding what the green run needed to accomplish versus what happened. Had they gotten through the gimballing tests, things would be more straightforward. And it depends on what caused the early shutdown. If it was ground related or a simple issue they might rationalize that since the first launch is unmanned that there could be some risk carried to the Artemis One launch, but without that gimballing I don't think they can get away without another green run. What you might see then is another testing firing and if they get through about half the time duration and get their gimballing and throttling tests done, if they shut down early after that they could call it a success and proceed with the schedule and without another firing test.
As my NASA counterpart love to say to get folks spun up, the Space Shuttle program was the first manned program where we had people on board for the first ever flight
From the NASA blog,After analyzing data from the test, NASA has determined that the problem was not with the engines or other hardware, which remain "in excellent condition," agency officials wrote in an update today (Jan. 19). Rather, the shutdown "was triggered by test parameters that were intentionally conservative to ensure the safety of the core stage during the test."
Those parameters concerned engine hydraulics — specifically, the system designed to gimbal, or pivot, each engine during flight. On Saturday, the preset parameters for Engine 2's system were exceeded, and the core stage's flight computers ended the test automatically, NASA officials wrote in the update. If this same issue crops up during an actual flight, the SLS will be able to fly through it, they added.
And...These preprogrammed parameters are designed specifically for ground testing with the flight hardware that will fly NASA’s Artemis I mission to ensure the core stage’s thrust vector control system safely moves the engines. There is a thrust vector control (TVC) system that gimbals, or pivots, each engine, and there are two actuators that generate the forces to gimbal each engine. The actuators in the TVC system are powered by Core Stage Auxiliary Power Units (CAPU). As planned, the thrust vector control systems gimbaled the engines to simulate how they move to direct thrust during the rocket’s ascent.
During gimballing, the hydraulic system associated with the core stage’s power unit for Engine 2, also known as engine E2056, exceeded the pre-set test limits that had been established. As they were programmed to do, the flight computers automatically ended the test. The specific logic that stopped the test is unique to the ground test when the core stage is mounted in the B-2 test stand at Stennis. If this scenario occurred during a flight, the rocket would have continued to fly using the remaining CAPUs to power the thrust vector control systems for the engines.
During the test, the functionality of shutting down one CAPU and transferring the power to the remaining CAPUs was successfully demonstrated. This gimballing test event that resulted in shutting down the CAPU was an intentionally stressing case for the system that was intended to exercise the capabilities of the system. The data is being assessed as part of the process of finalizing the pre-set test limits prior to the next usage of the core stage.
Sounds a bit weasel-worded to me. "The specific logic that stopped the test is unique to the ground test when the core stage is mounted in the B-2 test stand at Stennis. If this scenario occurred during a flight, the rocket would have continued to fly using the remaining CAPUs to power the thrust vector control systems for the engines". However, it was known that this run was going to be on the B-2 test stand (duh) so either they didn't plan on this happening, which still means there's something not understood, or they knew that the test might shut down early, in which case they have been a bit misleading in their built-up to this test, which kept stressing a full duration run.Data analysis is continuing to help the team determine if a second hot fire test is required. The team can make slight adjustments to the thrust vector control parameters and prevent an automatic shut down if they decide to conduct another test with the core stage mounted in the B-2 stand.