January 10, 2025 Zimmerman/Batchelor podcast
Embedded below the fold in two parts.
To listen to all of John Batchelor’s podcasts, go here.
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Year: 2025
Overview Effect – Spin Gravity Compared
An evening pause: A fun look at the physics and scale of the many spinning space stations proposed by science fiction writers over the decades. None of this is real, since sadly we have done only a few very inconclusive efforts in space to test this engineering.
Hat tip John Hunt.
January 10, 2025 Quick space links
Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.
- Intuitive Machines’ first lunar lander apparently entered lunar orbit last year with a low point only 1.3 kilometers above the surface, far lower than expected
The engineers immediately scheduled an orbital burn to raise this low point to a reasonable number, as there was an actual risk the spacecraft might hit a mountain peak if not corrected.
- ESA’s director touts a joint ESA/China solar probe to study solar wind and magnetosphere
This tweet has very old information, apparently from before 2021. The probe is now scheduled for launch in 2025 on a Vega-C rocket
- Chinese grasshopper test stage spotted during transport
It appears the plan is to next test fly it up and down from a sea platform off the coast of Haiyang
- On this day in 1968 the Surveyor-7 spacecraft touched down softly on the Moon
It landed near the crater Tycho.
The old media logjam has broken: Even the left is now getting its news from new media
Sara Foster sees the light
In my essay yesterday describing how the wildfires in the Los Angeles area appear to finally be making conservatives out of a lot of partisan knee-jerk Democrats, I used a quote that I think is important because it illustrates a major cultural change in a way that is not obvious at first. It also demonstrates a new political reality that the Democratic Party has not yet grasped.
The quote was from a tweet on X by actress Sara Foster. This is what she wrote:
We pay the highest taxes in California. Our fire hydrants were empty. Our vegetation was overgrown, brush not cleared. Our reservoirs were emptied by our governor because tribal leaders wanted to save fish. Our fire department budget was cut by our mayor. But thank god drug addicts are getting their drug kits. @MayorOfLA @GavinNewsom RESIGN. Your far left policies have ruined our state. And also our party.
Note the facts this clearly partisan Democrat cites.
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SpaceX completes two launches, reusing first stage a record number of times
Since early this morning SpaceX successfully completed two launches from opposite coasts.
First, in the early morning the company placed a National Reconnaissance Office payload into orbit, its Falcon 9 rocket lifting off from Vandenberg in California. The first stage completed its 22nd flight, landing on a drone ship in the Pacific. The fairings completed their 9th and 16th flights respectively. It is believed but not confirmed that the payload was another batch of “Starshield” satellites, SpaceX’s military version of Starlink.
Next, SpaceX sent another 23 Starlink satellites into orbit, its Falcon 9 rocket lifting off from Cape Canaveral in Florida. The first stage I think set a new reuse record, completing its 25th flight, landing on a drone ship in the Atlantic.
The 2024 launch race:
5 SpaceX
1 China
The reuse record is significant, as SpaceX’s fleet of first stages is beginning to record flight numbers comparable to NASA’s fleet of space shuttles, but it is doing so in far less time. For example, this 25th flight matches the entire number of flights by the shuttle Endeavour during its lifespan of almost two decades. This booster however accomplished the same number of reflights in only three and a half years.
In the next few years we should expect SpaceX’s Falcon 9 first stage fleet to eclipse the numbers set by the shuttles, and do so in a very spectacular manner.
Hubble captures a nice example of intergalactic microlensing
Click for original image.
Cool image time! The picture to the right, cropped to post here, was taken by the Hubble Space Telescope and released this week. I have specifically cropped it to focus on this ringlike feature, as it one of the nicest examples of micro-lensing I have seen. From the caption:
This curious configuration is the result of gravitational lensing, in which the light from a distant object is warped and magnified by the gravity of a massive foreground object, like a galaxy or a cluster of galaxies. Einstein predicted the curving of spacetime by matter in his general theory of relativity, and galaxies seemingly stretched into rings like the one in this image are called Einstein rings.
The lensed galaxy, whose image we see as the ring, lies incredibly far away from Earth: we are seeing it as it was when the Universe was just 2.5 billion years old. The galaxy acting as the gravitational lens itself is likely much closer. A nearly perfect alignment of the two galaxies is necessary to give us this rare kind of glimpse into galactic life in the early days of the Universe.
I am generally a very big skeptic of most astronomical studies that rely on micro-lensing. I don’t deny it happens and has been detected, as in this case. The uncertainties — such as the unknown distance to intervening galaxy that is causing the lensing — always require too many assumptions that make any reliable conclusions difficult.
Nonetheless, this object illustrates the phenomenon perfectly. The light from the distant galaxy is bent around the intervening nearer galaxy so that we that distant galaxy as a ring.
Cruz reveals another area where red tape is blocking SpaceX at Boca Chica: roads
In a interview with a local news outlet in Texas, Senator Ted Cruz (R-Texas) revealed that the state’s bureaucracy is stymieing SpaceX at Boca Chica in another unexpected way, getting the road to the facility repaired and upgraded.
“SpaceX has offered to invest their own money to improve the highway, and the problem is they’re running into permitting obstacles, environmental permitting obstacles that is slowing it down,” Senator Cruz said.
Cruz is the new Chairman of the Senate Committee on Commerce, Science and Transportation. There are steps he says he can take to fix these roads, even if it is not something that will directly address the issue. “As chairman of the Commerce Committee, I am very focused on permitting, on reducing the barriers of permitting, on speeding up the ability to do things like improve and expand State Highway Four,” Cruz said.
In a statement, Texas Department of Transportation spokesman Ray Pedraza said, “TxDOT is currently providing upgrades and pavement improvements for the existing SH 4 between Brownsville and Starbase Texas (SpaceX). TxDOT is also working with SpaceX on further planning and environmental efforts to achieve additional widening on SH 4 in the future.”
I think Cruz did this interview to apply some public pressure on the Texas Transportation Department. Hopefully it will get the tortoise moving.
Rocket Lab’s new Neutron rocket added to NASA’S contract bidding list
Rocket Lab yesterday announced that NASA has added its new Neutron rocket to its list of rockets that can bid of future NASA contracts.
The press release also says that the first launch of Neutron is still targeting 2025. If the company meets that data, the development of this rocket will have one of the fastest, if not the very fastest in history. The company first announced the project in December 2021. If it launches as planned it will have only taken three and a half years from announcement to launch. Quite impressive.
ISRO moving ahead with Spadex docking
India’s space agency ISRO has announced that it now moving ahead with the autonomous docking of its two Spadex spacecraft presently in orbit, but it will wait until after the docking to post when it had occurred.
With the Indian Space Research Organisation’s (Isro) SpaDeX space docking experiment missing two publicly announced schedules on January 7 and January 9, the space agency has decided to complete docking before making a public announcement.
Isro had earlier announced that the docking would be a public event but after two consecutive postponements, a senior Isro official said that the docking “is on track” but the space agency will now “dock and inform” the public about the exercise.
I suspect they realized the uncertainty of the real docking schedule made making the schedule public too difficult. This remains a test, and so many things can occur along the way to slow things down.
Johannes Brahms – Hungarian Dance #5
An evening pause: Performed live 2012 by the Hungarian Symphony Orchestra.
Hat tip Judd Clark.
January 9, 2025 Quick space links
Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.
- Blue Origin now targeting January 12, 2025 1 am (Eastern) for first launch of New Glenn
Just stay up late Saturday night to watch. I will try to post the live stream here. [Note: Link fixed! My error. Sorry.]
- Astra touts testing of its Rocket-4 upper stage tank
Very puzzling, as the company had said it was delaying construction of Rocket-4 for several years as rebuilds the company from its almost bankruptcy. Maybe now that it is in private hands again things are moving. Or not. We shall see. [Note: Link fixed. My error. Sorry.]
- Rocket Lab touts its progress as prime contractor to build eighteen satellites for the military
My how things have changed. In the old days, it would take almost a decade for the Pentagon to build and launch one satellite, and it would cost billions. Buying the product from the private sector now means they get it fast many times over, and for far less.
- The orbital debris that fell in Kenya possibly identified as coming from an Ariane-5 launch in 2008
Nothing is confirmed as yet.
- Vast installs hatch on the “primary qualification unit” for its Haven-1 space station
It remains unclear whether this unit will become the station module itself, or act merely as a testing unit. If the latter, I wonder if it will be possible for Haven-1 to be launched before the end of 2025, as the company promises.
The new conservatives who have been mugged by a wildfire
Gavin Newsom, surveying the hellhole his
policies created. Looks proud, doesn’t he?
The news today is about how numerous Hollywood celebrities who have lost their homes in the wildfires that have been destroying huge swatches of the Los Angeles metropolitan area are one-by-one expressing loud public outrage at the mismanagement and failures of the Democrats running California’s state and city governments.
The list is long and detailed at the link. This comment is quite typical:
Actress Sara Foster also took to X to lament how Los Angeles residents pay exorbitant taxes but the state was still completely unprepared to take on such massive wildfires. “Our fire hydrants were empty. Our vegetation was overgrown, brush not cleared. Our reservoirs were emptied by our governor because tribal leaders wanted to save fish. Our fire department budget was cut by our mayor. But thank god drug addicts are getting their drug kits,” she wrote.
The politically active actress, who is the daughter of music mogul David Foster, called on [LA mayor] Bass and Gov. Gavin Newsom to resign, writing, “your far left policies have ruined our state. And also our party.” [emphasis mine]
The highlighted words tell us however that Foster is not yet ready to reject the corrupt, bigoted, and incompetent Democratic Party that she so loves. This has been the pattern now for decades. No matter how bad its policies, the partisan adherents to the Democratic Party have too often consistently resisted opening their minds to other choices.
It immediately occurred to me however that this present outrage is only a foretaste of the real outrage soon to come. » Read more