Year: 2017

The best infrared image yet of a star’s surface

10:34 am

The surface of a star

Astronomers, using the Very Large Telescope in Chile have taken the best infrared image of the surface of a star, revealing gigantic granules or convection cells, across the star’s surface. These cells are somewhat similar to the bubbles you see when you simmer tomato sauce. Our own Sun usually has about two million such cells across its surface. For this aging red giant, which has the same mass as the Sun but has expanded to 350 times its diameter, things are different.

[The astronomers] found that the surface of this red giant has just a few convective cells, or granules, that are each about 120 million kilometres across — about a quarter of the star’s diameter [2]. Just one of these granules would extend from the Sun to beyond Venus.

I have posted the image on the right, reduced slightly in resolution to show here. The press release says that this is the first time that such granules have been imaged, but I think that is a bit of an overstatement. In fact, one of the very first articles I ever wrote, back in 1994, described an infrared image taken of Betelgeuse that showed similar giant bubbles or cells. What makes this image significant is its improved resolution. The ability to see smaller details on the faces of distant stars continues to improve.

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Musk releases pictures of assembled Falcon Heavy in hanger

9:40 pm

Falcon Heavy in hanger

Capitalism in space: Elon Musk today tweeted several pictures of the Falcon Heavy rocket, assembled in its hanger at Cape Canaveral and awaiting roll out for its first static fire tests on the launchpad.

As I will have nothing to do with Twitter, I must thank reader Michael Phillips for emailing me the photos. The one of the right I think shows the most detail. Note that the two side stages are previously flown Falcon 9 first stages. Only the central core has not flown before. According to previous reports, it required significant redesign to work in this configuration.

There is as yet no word on exactly when the roll out and launchpad static fire tests will take place, but all indications suggest it will be very soon. Whether the launch itself will follow several weeks later, as the link above says and has been stated many times by SpaceX, is more questionable. Remember, they have never fired all 27 engines of the threefold first stage at the same time. I am expecting that they will need time to review the data from that static fire test. I would be very surprised if their analysis and any changes it calls for will be doable in only a few weeks.

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Aryeh and Gil Gat – The Sound of Silence

6:01 pm

An evening pause: I think this song is fitting for the last night of Hanukkah. For Jews, this verse well describes perfectly what it is like when they try to express their point of view in a harsh and hostile world:

“Fools” said I, “You do not know
Silence like a cancer grows
Hear my words that I might teach you
Take my arms that I might reach you”
But my words like silent raindrops fell
And echoed in the wells of silence

The two singers are brothers and rabbis, and are performing here for an Israeli television show modeled after American Idol called Rising Star.

Hat tip Jim Mallamace.

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Two finalists for 2020 deep space planetary mission picked by NASA

1:16 pm

NASA has narrowed its choice for a 2020s deep space planetary mission to two finalists, either a sample return mission to Comet 67P/C-G or a drone that would fly through Titan’s atmosphere.

The sample return mission sounds very doable with today’s technology. The Titan drone mission however is far more intriguing.

Dragonfly is a dual-quadcopter lander that would take advantage of the environment on Titan to fly to multiple locations, some hundreds of miles apart, to sample materials and determine surface composition to investigate Titan’s organic chemistry and habitability, monitor atmospheric and surface conditions, image landforms to investigate geological processes, and perform seismic studies.

If it was up to me and I had unlimited funds, I’d go with Dragonfly. We know far less about the outer solar system, and this mission would be an ideal way to increase that knowledge. It is also far more daring, which carries the risk that the costs to build and launch will rise uncontrollably.

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A weaponized and partisan Justice Department and FBI

12:42 pm

On many of today’s complicated political stories, I tend to hang back and avoid posting my thoughts about them when the stories initially break. Often I do so because the story itself is either unreliable or simply trivial, and time is needed to find this out. Often I wait because I want more information to confirm my initial conclusions. Sometimes I wait because I consider the story merely a Republican partisan attack that is not strong on the merits and will fade with time.

Though I have previously posted my impression that Robert Mueller investigation into Russian-Trump collusion during the campaign is nothing more than a Democratic Party witch hunt against the Trump administration, I have recently held back noting recent stories because I wanted to compile them to see if they really did fit this pattern. Below are those stories, all of which have appeared in the past two weeks. They strongly prove that Mueller’s investigation is exactly what I first surmised.

These stories all confirm a July story that was headlined: Here’s a Look at Special Counsel Robert Mueller’s 15 Attorneys: A Who’s Who of Liberal Activism. Of those 15 attorneys, four have now been proven to be part of the Democratic Party partisan machine. Furthermore, evidence has been found that the FBI agent directly involved with both the Clinton and Trump investigations, Peter Strzok, moved to change the Clinton investigation conclusions to exonerate her, despite the evidence, while he was also repeatedly expressing strong partisan and anti-Trump opinions to one of those 15 attorneys.

One anti-Trump text by FBI agent Strzok is especially disturbing. In responding to a statement by Special Counsel Liz Page that she thought there was no way Trump could win, Strzok wrote the following:
» Read more

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Local Florida officials battle over $8 million grant to Blue Origin

9:51 am

Local county officials in Florida are involved in a court fight over the decision by the county to borrow $8 million in order to pay a grant to Blue Origin for locating its factory there.

Brevard County commissioners narrowly approved a plan that would allow the county to borrow money to pay for an $8 million economic incentive to rocket manufacturer Blue Origin. The vote was 3-2, with Chair Rita Prichett and Commissioners Jim Barfield and Curt Smith supporting the proposal. Vice Chair Kristine Isnardi and Commissioner John Tobia voted against the plan.

Brevard County Clerk of Courts Scott Ellis told commissioners he plans to go to court to challenge the legality of the county borrowing money to pay for the grant to Blue Origin.

Isnardi is quoted in the article as saying “I don’t think it’s a great policy to give $8 million to a billionaire.” The opposition to this grant also questions the legality of borrowing money to pay it.

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World View balloon explodes

9:42 am

Capitalism in space: A World View balloon exploded at its launch facility in Tucson yesterday.

No injuries were caused when a large, tethered test balloon ruptured as crews deconstructed it after a successful ground test to fill the balloon, World View spokesman Andrew Antonio said. The rupture resulted in a loud sound heard in the area, and a small fire on the balloon, he said. “We have reached out to reassure our immediate neighbors,” Antonio said. “There were no injuries and only superficial facility damage at the site.”

World View says it can use either helium or hydrogen gas to fill its stratospheric balloons but has initially been using hydrogen, which company officials have said is safe when handled properly.

World View also released its first images from a Stratollite balloon flight yesterday.

I think the second link demonstrates clearly that Stratollite is a good concept for high altitude reconnaissance. I think the first link demonstrates that hydrogen is still problematic for high altitude balloons.

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Virgin Galactic signs deal with Italy for dedicated research flight

9:28 am

Yawn. Virgin Galactic has announced that it has signed a deal with Italy for a future SpaceShipTwo research flight.

I feel obliged to report this, but am also very skeptical about it. They have still not performed any powered flights with their new ship, Unity. And their last glide test was four months ago. They state that they will have a full test flight program in 2018, but we have heard that story so many times before we’d all be silly to believe them now.

When they start flying, I will start taking them seriously again. Not before.

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Smallsat industry considering standardized “launch unit”

9:18 am

Capitalism in space: The emerging smallsat industry is considering establishing a standard “launch unit,” similar in concept to the standardized container system used by the shipping industry on Earth, to ease payload scheduling and installation on rockets.

“Developing a standard Launch Unit, or Launch-U, for mid-sized smallsats — approximately the size between a toaster and a small refrigerator — will enable rideshares to be configured more quickly and efficiently, resulting in more launch opportunities at a lower cost,” Aerospace representatives said in a statement. “Aerospace [Corporation] is driving the Launch-U conversation by assembling representatives from industry, academia and government to set the mid-size smallsats standard.”

For example, this standardized container concept would make it easier for a smallsat to switch launch rockets should its initial ride get delayed.

The industry has already attempted some standardization with the cubesat idea, which universities have been using now for several decades, a standard-sized satellite structure that is ten centimeters to a side. This launch unit concept would add the standardization to the launch vehicle, creating a standard slot within rockets that could easily take on new satellites.

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Blue Origin still a year away from launch humans on New Shepard

9:09 am

Capitalism in space: Blue Origin revealed yesterday that it will still be a year at least before they start flying humans on their suborbital New Shepard spacecraft.

The company plans to later fly humans, both as payload specialists for human-tended experiments as well as on tourist flights. Those flights, though, are still at least a year away. “We’re probably a year and a half, two years out from when we’re actually able to fly tended payloads,” Ashby said. “We’re about roughly a year out from human flights, depending on how the test program goes. We have a bunch more tests to do, and we’re going to fly some human test flights before we put paying people in the rocket.”

Previously they had suggested they would be flying humans much sooner, possibly this year. Despite this new delay, last week’s test flight did include Blue Origin’s first paying customers, and the company indicated that they have sold space on all their upcoming unmanned test flights, and that their manifest for those upcoming flights is essentially full.

Though I know many disagree with me, I am increasingly doubtful there will ever be a viable suborbital tourist business. Once commercial orbital manned flights become available, I don’t see there being much profitable interest in such short suborbital experiences. The cost will be too high in comparison with the payoff. And it appears that those commercial orbital manned flights are going to be arriving at about the same time as New Shepard’s first manned flight.

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