#materials for #flying rockets to #space
on 02026-09-06#SpaceX #video about #Starship (#BFR) with almost 25 minutes of high-production-value drama #space
on 02026-05-05retrospective about #Goddard and #flying to #space and the #history of rockets
on 02026-04-28#space science #fiction about traveling to Venus with antigravity
on 02026-04-28Tsiolkovsky published his rocket equation, $\Delta v = v_{\text{e}} \ln {\frac {m_0}{m_f}} = I_{\text{sp}}g_0 \ln {\frac {m_0}{m_f}}$, for #flying to #space in 01903, though #Goddard and some dude named Herman Oberth derived it independently. #history
on 02026-04-28#PDF scan of the Smithsonian’s orignal publication of #Goddard’s original 01919 rocket #paper “A Method of Reaching Extreme Altitudes”. The illustrations are much better scanned and the typoography is better than in NASA’s collection. #space #flying #history
on 02026-04-28#PDF with a collection of papers from the #history of #NASA and #flying in #space, including an abridged and poorly reformatted version of #Goddard’s original #paper, with the figures redrawn poorly and the plates omitted, where he seems to be unaware of Tsiolkovsky’s work on the rocket equation.
on 02026-04-28#Maciej on #Mars missions. #space
on 02026-04-24#PDF #nutrition information on #sprouts. Claims 1 cup (99g) of pea shoots (3.5oz) contains 50% USRDA of #vitamin-C, 3 oz (84g) of broccoli sprouts contains 60%, 1 cup of garlic sprouts (113g) or 1 cup (85g) of onion sprouts contains contains 30%. Possibly of interest to #survivalists or for #space, if true: an easy way to use seeds and (possibly recycled) water to make vitamin C.
on 02026-04-16#space toilets on the #ISS, the #Space-Shuttle, and on #Mars
on 02026-04-14“#Artemis-II Heatshield Concerns” 18 pages. #space #flying
on 02026-04-09#Maciej predicts #Artemis-II might crash tomorrow. “It’s likely—hopefully very likely—that Artemis II will land safely. But do we really have to wait for astronauts to die to re-learn the same lessons a third time?” #space #flying
on 02026-04-09the solid rocket boosters for #flying to #space that provided most of the #Space-Shuttle’s initial thrust
on 02026-04-06#Iran has seven satellites in #space launched by its own rockets: Noor-2 (02022-03-08); Noor-3 (Najm, 02023-09-27); Soraya (02024-01-20); the triplet Mehda, Kayhan 2, and Hatef 1 (02024-01-28); and Chamran-1 (02024-09-14).
on 02026-04-03calculations about what you’d need for #data-centers in #space, like how many square meters of cooling panels, etc. Doesn’t consider a fleet of tiny microsatellites. “I suppose this is just about possible if you really want to do it, but I think I’ve demonstrated above that it would firstly be extremely difficult to achieve, disproportionately costly in comparison with Earth-based datacenters, and offer mediocre performance at best.”
on 02026-01-06#video on current #space #news, including a broken window in a Chinese space capsule
on 02025-11-20#NOAA weather #satellites in #space just stopped transmitting the #APT pictures
on 02025-08-27#news about #Trump destroying #NASA #CO2 monitoring satellites, the Orbiting Carbon Observatories. #space #politics #toread #USA
on 02025-08-27“The Russian Meteor-M orbiting satellites (there are two of them) have fair resolution and broadcast at 137.9 MHz with a signal strong enough to capture with a simple QFH antenna (fixed, omnidirectional) that you can easily build yourself. Their camera scans like a raster and transmits real time images as it passes overhead. The free SatDump software works fine for decoding.” #space #radio #communications
on 02025-08-27#PDF #paper on the ITHACO reaction wheel failure in #space telescope Kepler, FUSE, etc.
on 02025-08-06Explanation of why #space telescope Kepler died after only four years: “One reaction wheel bearing manufacturer, whose RWA line was used in Kepler and FUSE, performed a relentless root cause analysis and found that these bearing failures all occurred while or just after the Sun was in the midst of violent activity. After painstaking analysis and testing, they proposed that these failures were caused by electrical arcing through the reaction wheel bearings. The huge amounts of radiation released during these solar storms were creating a voltage difference across the bearings, and when that voltage discharged, bearing damage and sometimes failure occurred. The researchers’ paper summarizing their findings can be found here.”
on 02025-08-06#Space telescope Kepler died after only four years because of reaction wheel bearing problems
on 02025-08-06#video on the lunar lander #Resilience, which died because the laser rangefinders it was relying on experienced unexpected #latency. #space
on 02025-06-17#California Coastal Commission wins #politics lawsuit against #Musk for #SpaceX, but he can refile. ““The concern is legitimate when a local body injects politics in its decision-making,” [Trump-appointed district judge Stanley] Blumenfeld told SpaceX attorney Tyler Welti. “I get the concern. But where is the harm?”” #Trump #space #California
on 02025-03-18“She joined the majority on Thursday in rejecting the Defense Department’s application on behalf of Musk’s SpaceX to increase the number of satellite launches from Vandenberg Space Force Base from 36 to 50 per year.” #politics #Trump #Musk #SpaceX #space #California
on 02025-03-18Last October: “The suit pointed to comments made during last week’s public hearing by commissioners, who made note of Musk’s political involvement during this election. According to the suit, [#California Coastal] Commissioner Caryl Hart [wife of Grateful Dead drummer Mickey Hart] noted SpaceX is led by someone who has “aggressively injected himself into the presidential race and made it clear what his point of view is.” Commissioner Gretchen Newsom added, “Right now Elon Musk is hopping around the country, spewing and tweeting political falsehoods and attacking FEMA while claiming his desire to help the hurricane victims with free Starlink access to the internet.”" #politics #Trump #Musk #SpaceX #space
on 02025-03-18#Breaking-Taps (Zachary Tong) #video on liquid-metal ion thrusters for #space
on 02025-03-06#video on #SpaceX. Mentions that a recent Falcon 9 launch from launchpad SLC-40 at Cape Canaveral broke the record for the fastest turnaround time: 13 days and 12 hours to reuse the booster. Also mentions Rocket Lab as another company working on reusable spaceflight, with #space rockets Electron (already providing launches but not reusable) and Neutron. But ABL Space Systems is abandoning the commercial space launch market, following Virgin Orbit and Relativity Space. Also there’s Astra. Somehow completely fails to mention ULA or any of the rocket companies in China.
on 02024-12-06#China #space rocket company #Space-Pioneer calls their rocket Tianlong-3 天龙三号 and their engine Tianhuo-12 or TH-12 天火-12. Hilarious.
on 02024-12-06#video on #China’s eight most promising reusable #space rocket companies: #LandSpace (whose #ZhuQue-3 is powered by TQ-12As), iSpace (whose Hyperbola-3 is powered by Jiaodian-2s), Galactic Energy (whose Pallas-1 is powered by Cangqiong-50s), CAS Space (whose Lijian-2 is powered by YF-102s), #Space-Pioneer (whose Tianlong-3 is powered by Tianhuo-12), Orienspace (whose Gravity-2 is powered by Yuanli-85s), Deep Blue Aerospace (whose Nebula-1 is powered by Leiting-1Rs), and SAST (whose engine is called Longyuan). SAST (the Shanghai Academy of Space Technology), LandSpace, and iSpace are using methalox, while the others are kerolox. Seven of these (excluding Deep Blue Aerospace) already have regular launch income from disposable rockets, mostly solid-fueled. Also Long March 10 (which I think is made by the government) is going to reusable boosters and is going to be trying to catch them in a sort of crisscross of movable tethers. China plans to launch two Starlink-like megaconstellations called #Qianfan (by Shanghai Spacecom, 15000 satellites) and #Xingwang (by China SatNet, 13000 satellites).
on 02024-12-06#China #video on #Zhuque-3 (朱雀三) reusable #space rocket 10 months ago, built by private space exploration company #Landspace, fueled by lox and methane. 9 1000-kN (100-tonne) TQ-12B engines, 76.6m tall, 4.5m diameter, 21.3 tonnes (?). Second stage has a single TQ-15B engine blowing 1183kN at 3500m/s. Looks very, very similar to a #SpaceX Falcon. Slogan: “The key to freer access to space.”
on 02024-12-06#China reusable rocket #CGTN #space #video #ZhuQue-3
on 02024-12-06#China is landing (well, “landing”) reusable rockets on fold-out landing legs like #SpaceX, according to Chinese state government TV channel. This seems to be the Deep Blue Aerospace Nebula-1, reaching 10km altitude. #CGTN #space #video
on 02024-12-06#CC BY-SA #paper on #space food from asteroids such as asteroid Bennu
on 02024-11-27discussion of making #space food from asteroids with bacteria, fungi, etc.
on 02024-11-27#CC #paper on how #space satellites produce #alumina that can deplete the ozone layer upon reentry. “Satellites burn up at the end of service life during reentry, generating aluminum oxides as the main byproduct. These are known catalysts for chlorine activation that depletes ozone in the stratosphere. We present the first atomic-scale molecular dynamics simulation study to resolve the oxidation process of the satellite’s aluminum structure during mesospheric reentry, and investigate the ozone depletion potential from aluminum oxides.” #environment
on 02024-11-19concern that #space satellites might damage the ozone layer upon reentry because of metallic ash #environment
on 02024-11-19‘“Ten years ago, the amount of [ozone-depleting] emissions [from rockets] was not great,” said Martin Ross, an engineer at the Aerospace Corp. whose research focuses on the effects of #space systems on the stratosphere. “Today, the effect is still small, but it’s growing.” (...) Ross has been modeling how the chemistry of rocket exhaust affects the stratospheric ozone layer for years. (...) Solid-fueled rocket motors, such as the side boosters that were used in the shuttle program or will be used for NASA’s heavy-lift Space Launch System, pose the knottiest problems, “in that the emissions are a more varied mix,” Ross said.
Those rockets emit black carbon (basically, soot) as well as alumina particles and chlorine-based compounds. All three types of emissions can promote ozone-destroying reactions, particularly when they’re injected directly into the stratosphere.
When it comes to kerosene-fueled rockets, such as #SpaceX’s Falcon 9 and Falcon Heavy, black carbon is the primary concern. “Once those particles get into the stratosphere, they stay in there for three or four years,” Ross said.’ #environment
on 02024-11-19There was a famous open letter by a famous scammer claiming that #SpaceX rockets opened up holes in the ozone layer, but it turned out not to be true. #environment #space
on 02024-11-19When #SpaceX #Starship exploded in 02023, it opened up a hole in the ionosphere which closed again in 20–30 minutes, but not in the ozone layer. #environment #space
on 02024-11-19#video #toread about nuclear #rockets #flying to #space (44-minute lecture with FEM output)
on 02024-10-17#Asteroid-mining in #space by #AstroForge #toread
on 02024-08-25"Scanalyst", John Walker’s right-wing #politics and #space analysis site
on 02024-07-28the Kessler Syndrome situation in Earth orbit #space
on 02024-06-18#SpaceX Crew #Dragon Endeavour is about to make its fifth flight. They’re still flying Russian cosmonauts despite the Ukraine war. #space
on 02024-03-06#space Lunar Roving Vehicle documentation, including manuals, schematics, etc.
on 02024-02-22#space #pricing US$118500/kg in 01961 with Scout; US$14900/kg in 01962 with Kosmos; US$8200/kg in 01965 with Proton; US$5400/kg in 01967 with Saturn V; US$5100/kg in 01985 with Zenit 2; US$2600/kg in 02010 with Falcon 9; US$1500/kg in 02018 with Falcon Heavy. #SpaceX Starship is supposed to be 150 tonnes for US$10 million; US$70/kg?
on 02024-02-22Ron Garret on #debugging and fixing a failure on Deep #Space 1 when it was 200 million km away. #history #NASA
on 02024-01-31Hmm, #Satellogic’s #space #earth-observation #satellites are all launched by SpaceX since 02021. Like, NewSat 19 to NewSat 39, inclusive, while all the previous ones were Chinese except for NewSat 6 on Vega SSMS from French Guiana. And now they’re #hyperspectral.
on 02023-11-18first metal asteroid to be visited by a humanspace probe. #space
on 02023-06-04William #Shatner on his #Blue-Origin trip to #space and the dramatic perspective change it forced on him
on 02022-10-12notes on an orbital ring for #space launch
on 02021-12-052000 new #satellites launched into #space the last 2 years, doubling the total
on 02021-07-20smallsat launchers, rockets with under about one tonne payload. #space
on 02021-05-29list of types of #propulsion systems for #space travel
on 02020-11-18MODIS (36-band, infrared, 250m resolution) data is available, but old #datasets are being “decommissioned”: “The Level-1 and Atmosphere Archive and Distribution System (LAADS) Distributed Active Archive Center (DAAC) plans to decommission the following Terra and Aqua MODIS product collections on June 30, 2017. Starting on July 1, 2017, users interested in accessing and acquiring Collection-5 (C5) decommissioned land products may do so from the Land Processes DAAC. Users will have no recourse to access the C5.1 MODIS atmosphere collections starting August 1, 2017, and are advised to use the C6 collection. Users will have no recourse to access the C5 MODIS L1 products starting January 1, 2018, and are advised to use the C6 MODIS L1 collection.” Not sure if this has to do with #Trump #politics trying to cover up #climate-change. Also they have a self-signed TLS certificate. #space #remote-sensing
on 02017-06-14Earth Explorer is the system of USGS EROS for exploring remote sensing data from #satellites. You need to create an account to download datasets, but you do not need to pay. #space #remote-sensing
on 02017-06-14Spacesuit’s perineal access port contains miniature airlock; inflatable bedpans can be passed through the opening and removed while in vacuum without depressurizing the suit. #space
on 02017-06-14#space travel using The Ghost, a fusion rocket powered by a neutron-pumped laser, designed to go at 0.06c #propulsion
on 02017-06-14countdown page for #Milanesat (aka NewSat-3), launched by #Satellogic; sadly no link to video or anything #space
on 02017-06-14The ½% perchlorate content of #Mars soil may impede #space colonies on Mars
on 02017-06-07launching a satellite still costs several hundred thousand dollars. #space
on 02017-04-07#China launches two taikonauts to #space station #Tiangong 2 on a Shenzhou-11 lifted by a Long March-2F at 07:30 local time from Inner Mongolia.
on 02016-10-17The Rosetta #space probe was launched with a #Rosetta-Disc in 2008 and eventually came to rest on Comet 67P/Churyumov-Gerasimenko. #archival
on 02016-10-11STL models for #3d-printing of models of NASA #space things, including Vesta
on 02016-07-0446 clumps of copper needles are still in MEO in #space as of 2013 after a 1963 launch.
on 02016-05-04