Author: Robert Zimmerman

The Milky Way shrinks

9:49 pm

The uncertainty of science: New research by astronomers suggests that the Milky Way is about half as massive as previously estimated.

In the sixties I remember astronomers claiming that the Milky Way was twice as big as Andromeda. Then it was considered half as big. Most recently it was considered about the same size. This new research makes it half as big as Andromeda again.

In other words, the data is very uncertain, and the scientists really don’t have a good handle on it. None of these conclusions should be taken very seriously. All we really know at this point is that the Milky Way and Andromeda are approximately comparable.

5 comments

SpaceShipTwo flies again

9:44 pm

The competition heats up: For the first time in six months SpaceShipTwo completed a test flight today.

The article above is from NBC, which also has a deal with Virgin Galactic to televise the first commercial flight. It is thus in their interest to promote the spacecraft and company. The following two sentences from the article however clearly confirm every rumor we have heard about the ship in the past year, that they needed to replace or completely refit the engine and that the resulting thrust might not be enough to get the ship to 100 kilometers or 62 miles:

In January, SpaceShipTwo blasted off for a powered test and sailed through a follow-up glide flight, but then it went into the shop for rocket refitting. It’s expected to go through a series of glide flights and powered flights that eventually rise beyond the boundary of outer space (50 miles or 100 kilometers in altitude, depending on who’s counting).

Hopefully this test flight indicates that they have installed the new engine and are now beginning flight tests with equipment that will actually get the ship into space.

Leave a comment

Jews attacked in Germany

3:58 pm

The evil returns: In Germany a synagogue is firebombed and a rabbi gets death threats merely because they are Jewish.

As one commenter at the website above explained when another commenter asked for an explanation of anti-semitism, “An example of anti-Semitism is where people in the middle east are shooting at each other and an uninvolved Jewish man in Wuppertal gets death threats because of it.”

Reading the comments and the amount of childish hate that exudes from too many of them will certainly depress you.

One comment

ISEE-3 engine restart fails but the private effort continues

11:57 am

After numerous tries, the private effort to put ISEE-3 back into its original orbit has failed.

We have completely accomplished all of our original goals except for one: firing the ISEE-3 propulsion system in a sufficient fashion to alter its trajectory. We did operate the propulsion system briefly so as to correct the spin of the spacecraft, and to start the trajectory correction maneuver. The propulsion system works fine. The problem is that there is no longer any Nitrogen pressurant left in its tanks to allow it to work.

36 years and more than 30 billion miles have taken its toll on the spacecraft’s propulsion system. We have exhausted every option to bring the engines online so as to conduct the correction maneuver required to place it in its planned orbit. Without the pressurant it just won’t work.

Have they given up? No! Though the spacecraft will remain in a solar orbit where maintaining communications will be difficult if not impossible, they are going to try anyway, and are even going to run another crowd-sourcing campaign to finance it.

Leave a comment

Black bigots in California

10:54 am

Black leaders in Fresno, California want to stop the hiring of a teacher merely because his skin color happens to be white.

On Monday morning, a small band of activists showed up in front of the sparkling new school at the corner of Martin Luther King Jr. Boulevard and Church Avenue. The local press was also there. “We’re just saying what the community wants,” said Rev. Karen Crozier, one of the activists. “We didn’t fight for a white male or female teacher to educate our babies.” Crozier, who appears to be a professor at Fresno Pacific Biblical Seminary, also suggested that a white person cannot teach minority children in this instance because of racism.

Sometimes the bigotry and blindness of people just leaves me speechless.

In related news, the organizer of a “gay” job fair is outraged that non-gays keep showing up there looking for jobs.

Leave a comment

Gaia commissioning complete

9:47 am

After several months of in-orbit analysis, engineers have declared the European space telescope Gaia ready to begin research.

There have been several issues that had raised concerns, but from the article it sounds as if the engineers have either corrected the problems or have found ways to overcome or mitigate them.

Gaia will measure the movement and location of a billion stars, allowing astronomers to map the Milky Way better than ever before.

Leave a comment

Congress restores most VA bonuses

9:39 am

After the House voted 421-0 in June to eliminate all bonuses at the Veterans Administration in response to the scandals there, a compromise bill with the Senate has restored most of those bonuses.

The compromise bill announced Monday by the chairmen of the House and Senate Veterans’ Affairs Committees says VA bonuses will be capped at $360 million annually for the next ten years. But that cap is just 10 percent below the $400 million in bonuses the VA has distributed in recent fiscal years, and will allow up to $3.6 billion in bonuses to be awarded over the next decade.

“In each of fiscal years 2015 through 2024, the Secretary of Veterans Affairs shall ensure that the aggregate amount of awards and bonuses paid by the Secretary in a fiscal year… does not exceed $360,000,000,” the bill says. A description of the bill adds that members expect the VA to implement this cap in a way that does not “disproportionately impact lower-wage employees,” although the legislation itself does not include any restriction on how to award the money.

More evidence that our elected officials don’t represent us, but the employees of the government instead.

Leave a comment

World War I underground

9:28 am

Visiting the underground tunnels of World War I.

At the height of the underground war, in 1916, British tunneling units detonated some 750 mines along their hundred-mile sector of the front; the Germans responded with nearly 700 charges of their own. Hills and ridges that provided vital lookout points became riddled like Swiss cheese, while the biggest mines blew out huge craters that still scar the landscape to this day. Even a single small mine could wreak havoc: In the tunnel complex we crawled into, a charge set off by the Germans on January 26, 1915, killed 26 French infantrymen and wounded 22 more.

But the underground war was not confined to narrow tunnels. Beneath Picardy’s fields and forests are centuries-old abandoned quarries, some of which could shelter thousands of troops. On a misty morning we explore one such site, located along a cliff edge overlooking the Aisne Valley. We’re led there by the owner of the ancestral property, which we agree not to name to protect the quarry from vandals.

Read the whole thing. It reminds me of my experience exploring the mines under Tombstone. These tunnels provide an archeological window into the history of the first World War.

Leave a comment

Amazon’s 3D printshop opens

9:20 am

The competition heats up: Amazon has opened its first 3D-print shop, where customers can buy 3D printed products.

The store has launched with more than 200 print-on-demand designs. Users can customize items like earrings, pendants, rings and bobble head dolls using a special widget, before having the item 3D-printed and delivered. …

Although users of the store cannot upload and print their own designs, it is, as mentioned, possible to customize some of the available designs. Amazon has built a customization engine into the store, allowing for very simple changes to an item’s design, or more wholesale changes. Interactive 3D preview functionality is also provided, with which users can rotate an object and view it from any angle.

What does this story have to do with space exploration? Well, it marks the beginning of a major revolution in manufacturing that will change everything. And since 3D printing is going to be an essential need for future space explorers, having this new industry prosper and grow can only speed up the exploration and settlement of the solar system.

2 comments

Venus Express is alive

9:03 am

After diving into Venus’s atmosphere on an aerobraking test that could have destroyed the spacecraft, the European probe Venus Express has now successfully used its last bits of fuel to raise its orbit back to research height.

Its present orbit will probably decay sometime in December, when the spacecraft will burn up in the atmosphere. However, the scientists running the mission though that was likely to happen during the aerobraking maneuver. Instead, Venus Express is giving them about another half year of research.

Leave a comment

Planet of geysers

2:54 pm

Using Cassini data assembled over the past seven years, scientists have now identified 101 distinct geysers erupting on the surface of the Saturn’s moon Enceladus.

Over a period of almost seven years, Cassini’s cameras surveyed the south polar terrain of the small moon, a unique geological basin renowned for its four prominent “tiger stripe” fractures and the geysers of tiny icy particles and water vapor first sighted there nearly 10 years ago. The result of the survey is a map of 101 geysers, each erupting from one of the tiger stripe fractures, and the discovery that individual geysers are coincident with small hot spots. These relationships pointed the way to the geysers’ origin.

The really important discovery here however is this:
» Read more

Leave a comment

Another DC gun ban ruled unconstitutional

10:29 am

Victory for freedom: On Saturday a federal judge ruled that the DC ban on carrying handguns outside your home was unconstitutional and must no longer be enforced.

Expect the crime rate in DC to finally begin declining.

Update: DC’s police chief today announced that they will no longer arrest anyone who has the legal right to carry a gun, concealed or otherwise, in DC or in any other state. This means they now recognize the gun laws of the rest of the country.

6 comments

Will Russia’s most powerful rocket engine be reborn?

10:13 am

The competition heats up? The original builders of the hydrogen-oxygen engine that launched the Soviet Union’s most powerful rocket, Energia, are pushing to restart production of that engine.

By 2013, the KBKhA design bureau, which developed the original RD-0120 engine, declared its restoration as one of several high-priority projects. According to a schedule developed by KBKhA in coordination with its manufacturing arm — the Voronezh Mechanical Plant — the RD-0120 could be brought back to production in six years, given adequate funding.

The final decision on the restoration of the RD-0120 would depend on the approved architecture of the super-heavy rocket, whose development was included into the latest draft of the Federal Space Program from 2016 to 2025. Plans to restore RD-0120 had its critics, who believed that a new investment into the hydrogen propulsion technology would be too costly and risky for the Russian rocket industry. A recent analysis of prospective super-heavy rocket designs by RKTs Progress, the developer of the Soyuz rocket, favored methane and solid propellants over the liquid hydrogen. At the same time, an alternative proposal from RKK Energia, the Russia’s chief manned space flight contractor, featured the RD-0120 engine on the third stage of the super-heavy Energia-KV rocket, industry sources said.

I’m not sure if it will be economically wise for Russia to focus their energies on this engine, or on a super-heavy rocket. Like NASA’s SLS, such projects look great for politicians and provide a lot of pork, but they generally are too expensive to accomplish very much.

3 comments

SpaceX launch schedule heats up

9:48 am

A close look at SpaceX’s launch schedule through the rest of 2014 calls for six Falcon 9 launches, including two before the end of August.

If the company is successfully in maintaining this schedule, they will end any doubts about their ability to transform the launch industry. Every other launch company will have to match their prices, or lose their customers.

One paragraph in the article does tell us that there are limits to the re-usability of the Falcon 9 first stage, even if they do succeed in bringing it back safely to a vertical landing on land.
» Read more

5 comments

Commercial communications satellites for Mars?

8:03 am

The competition heats up? NASA is considering a different commercial approach for providing communications to and from its Mars probes.

The purpose of NASA’s request for information, or RFI, released July 23 “is to explore new business models for how NASA might sustain Mars relay infrastructure, consisting of orbiters capable of providing standardized telecommunication services for rovers and landers on the Martian surface, in the Martian atmosphere, or in Mars orbit,” according to a posting on the Federal Business Opportunities website.

According to the post, NASA will use information it receives from respondents to inform its future Mars exploration strategies, but the agency has not decided to pursue a commercial interplanetary telecom initiative. “We are looking to broaden participation in the exploration of Mars to include new models for government and commercial partnerships,” said John Grunsfeld, associate administrator of NASA’s science mission directorate, in a statement. “Depending on the outcome, the new model could be a vital component in future science missions and the path for humans to Mars.” [emphasis mine]

It is important to highlight the fact that NASA has not yet made a decision on this issue. The best thing the agency could do, in my opinion, would be to step back, design nothing, but let private companies bid on providing the service. The expertise at many of the private satellite companies providing communications efficiently and inexpensively to private customers worldwide would easily provide NASA better communications at Mars for less money.

In other words, like manned flight and cargo delivery to ISS, NASA should simply become a customer, and let private companies build and own the products that NASA buys.

5 comments

SpaceX scores first in its suit against the Air Force

11:12 pm

A federal judge has denied the motion of the Air Force and ULA to dismiss SpaceX’s suit against their block buy launch contract that excludes competition from any other company.

The judge also required the parties go to mediation to settle their differences. Both rulings give added weight to SpaceX’s main complaint, that the company as well as others should have the right to compete for this Air Force launch work.

2 comments

Protecting the Mars orbiters from comet flyby

4:10 pm

Engineers are repositioning the American spacecraft orbiting Mars so that they will be better protected by the planet when Comet Siding Spring flies past on October 19.

The comet’s nucleus will miss Mars by about 82,000 miles (132,000 kilometers), shedding material hurtling at about 35 miles (56 kilometers) per second, relative to Mars and Mars-orbiting spacecraft. At that velocity, even the smallest particle — estimated to be about one-fiftieth of an inch (half a millimeter) across — could cause significant damage to a spacecraft.

NASA currently operates two Mars orbiters, with a third on its way and expected to arrive in Martian orbit just a month before the comet flyby. Teams operating the orbiters plan to have all spacecraft positioned on the opposite side of the Red Planet when the comet is most likely to pass by.

One comment

The loss of skepticism in science

3:19 pm

In April I taped a half hour television interview with George Noory for his subscription-based video show, Beyond Belief. Below is a clip from that interview, where I describe the terrible state of climate research, and how politics is destroying the very heart of what science stands for. Too many people are no longer open-minded. Rather than relay on the data they push their theories instead.

Robert Zimmerman discusses the truth about climate change with George Noory!

2 comments

Sierra Nevada signs deal with Japan

9:14 am

The competition heats up: Japan has signed a development agreement with Sierra Nevada in connection with its Dream Chaser manned spacecraft.

I was also tempted to preface this post with the phrase, “Who needs NASA?” Sierra Nevada has a viable product that can get humans into space cheaply. Several countries, Germany, now Japan, want to get their own citizens into space, and have realized what a bargain Dream Chaser is. Sierra Nevada is taking advantage of this demand to sell its product worldwide. If Congress decides to defund them, or NASA decides not to pick them to continue development, they very clearly intend to build the ship anyway. It just won’t be used to put American astronauts into space.

3 comments

Russia loses contact with Photon-M

9:06 am

Russia has lost contact with its Photon-M biology spacecraft, launched last week with a four geckos on board.

The Russians say that the receipt of telemetry from the spacecraft shows it is successfully operating autonomously without help from the ground. And since the Russians have a great deal of experience building spacecraft that can function on their own, I have no reason to disbelieve them in this. What is not clear is whether the spacecraft can come home on its own.

One comment
1 … 761 762 763 764 765 … 1,119