Religion banned in shopping mall
Fascism in America: A shopping mall in Georgia has outlawed all prayer, even for those about to eat in their food court.
Author: Robert Zimmerman
Eta Carinae’s next big show
Astronomers are gearing up to observe the next binary fly-by of Eta Carinae’s companion star over the next few weeks.
A binary system, ฮท Carinae has two stars that swing past one another every 5.5 years. The bigger star โ some 90 times the mass of the Sun โ is incredibly unstable, always seemingly on the verge of blowing up. When the smaller companion star makes its closest approach to the primary star, as is happening now, the interaction between the two triggers violent changes in the high-energy radiation pouring out of the system.
Astronomers are watching the show in the hope of learning what drives this enigmatic system. In the 1840s, ฮท Carinae had a mysterious eruption; in recent decades, it has again brightened unexpectedly. โThe star is in an awfully deranged state, and no one knows why,โ says Kris Davidson, an astronomer at the University of Minnesota in Minneapolis.
Eta Carinae is also famous because it was one of the first objects imaged by Hubble after its repair in 1993, and was thus the first stellar explosion ever caught on camera in a visually sharp and clear manner. (See my book The Universe in a Mirror for that fascinating story.)
How does Comet 67P compare with other comets?
A quick preliminary comparison of the surface features of Comet 67P/C-G, compared to other comets that spacecraft have visited.
Video of the Falcon 9 first stage doing a soft splashdown
Video taken from a chase plane during the July 14 Falcon 9 launch shows the first stage appearing from out of the low clouds, engines firing, vertical and ready for landing. The video, below the fold, also shows the stage slowing just before it hits the water, much like the test vehicles Grasshopper and Falcon 9R do.
Though SpaceX has already claimed their first stage had done this during the July 14 launch, this video proves it. All they need to do now to recover their first stage is to direct it to a land-based landing site.
Hat tip to Doug Messier and Parabolic Arc for this story.
» Read more
Comet 67P/C-G at 126 miles
The image above was taken by Rosetta on August 4 from only 126 miles (234 kilometers). Unlike earlier images, this image is raw, uncropped and unprocessed. All I have done is rescale it to fit on my webpage. As they explain at the link,
As you can see, the comet is not centred in the full-frame image. This is a result of the rendezvous burn conducted the previous day, which adjusted Rosetta’s trajectory towards the comet. This effect is corrected for in the commands sent to the spacecraft after the new orbit has been determined.
The science team also notes that beginning tomorrow, the comet will be close enough that they will no longer have to provide a cropped close-up using the navigation camera and that this uncropped raw version will be sufficient.
An exoplanet that was once like a star
Astronomers, using WISE data, have discovered a strange exoplanet that is now as cool as a rocky planet, but was once as hot as a red dwarf star.
The current temperature of the object is 100-150 degrees Celsius, intermediate between that of the Earth and Venus. But the object shows evidence of a possible ancient origin, implying that a large change in temperature has taken place. In the past this object would have been as hot as a star for many millions of years.
Called WISE J0304-2705, the object is a member of the recently established “Y dwarf” class – the coolest stellar temperature class yet defined, added to the end of the sequence OBAFGKMLT (for historical reasons this is not in alphabetical order but follows a decline in temperature from O to T). Although its temperature is not far off that of our own world, the object is not like the rocky Earth-like planets and instead is a giant ball of gas like Jupiter.
As cool as this discovery is (no pun intended), I am most enlightened by the information in the second paragraph above. I had not realized that astronomers had added L, T, and Y classes to the low temperature end of their stellar classification system. For those new to astronomy, you remember the sequence of the first seven classes with the phrase “O Be A Fine Girl Kiss Me”. I wonder what how we can amend this phrase to include the L, T, Y, classes?
Another successful SpaceX commercial launch
The competition heats up: After a launch abort at T-12 seconds, the countdown was recycled and SpaceX’s Falcon 9 rocket lifted off at the very end of its launch window early Tuesday morning, putting an Asiasat communications satellite into orbit.
They still have to fire the thrusters to get the satellite to geosynchronous orbit.
U.S./Russian owned launch company ILS cuts workforce by 25%
The competition heats up: Business loses because of its recent Proton launch failures, combined with strong market competition from SpaceX, today forced International Launch Services (ILS) to cut its work force by 25%.
The company is anticipating a launch rate drop from an average of 7 to 8 missions a year down to 3 to 4. The article also noted one more additional detail that will affect the future market value of Proton:
So far in 2014, the commercial satellites ordered have been mainly at the lighter end of the market for geostationary-orbiting telecommunications spacecraft. This follows a couple of years in which heavier satellites dominated.
Commercial Proton rockets are typically used to launch heavier satellites one at a time. The marketโs move to lighter spacecraft has benefited Space Exploration Technologies Corp. of Hawthorne, California, whose Falcon 9 rocket has accumulated commercial orders; and also benefited Arianespace, whose Ariane 5 heavy-lift vehicleโs lower position is reserved for smaller satellites.
The weight of commercial satellites is almost certainly going to continue to drop in the coming years as technology improves and satellite companies work to reduce the cost to launch. In that climate, the Proton’s ability to put big commercial payloads into orbit will become a liability, not an asset. Ariane 5 has the same problem, in that it still needs a big payload for its upper position in order to make a launch cost effective.
Both Falcon 9, with its very low launch costs, and Russia’s new Angara rocket, with its modular design to handle all kinds of payload sizes, are better suited to this new competitive market.
SpaceX strikes deal with Texas to build spaceport
The competition heats up: Texas today announced an agreement with SpaceX, finalizing the company’s plans to build the world’s first commercial spaceport near Brownsville, Texas.
More here. The deal remains contingent on SpaceX getting all required permits from the federal government, but I doubt that will be a problem.
An Amtrak train abandons all of its passengers
Government-run transportation: An Amtrak high-speed train left New York City this weekend without its passengers, who were instead waiting to board on a different platform where railroad employees had sent them.
“They literally sent us to the wrong platform, and the conductor took off without any passengers,” Damien Miano, a stranded passenger told The Daily News. “The right hand didn’t know what the left hand was doing. It’s just so bizarre.”
Amtrak might make believe that it is a private company, but it has been a government entity for decades. Like the post office, it has no real incentive to make a profit and operate efficiently since all losses get covered by the federal government.
Coming soon to a hospital near you!
Hamas propaganda becomes Israeli comedy
At the start of the Gaza war four weeks ago Hamas released a propaganda music video calling for the destruction of Israel and for Palestinians to “exterminate the roaches.”
The problem was that the video was in Hebrew, not Arabic, and Israelis have found it hilarious and have made it a summer music sensation!
Surprisingly, though, Israelis found the tune of โAttack! Carry Out Terror Strikesโ extremely catchy. Making it even more fun was the flowery Hebrew, dotted with nonexistent words sung in a heavy Arab accent, all of which led to the song’s becoming a summer hit. It has since spawned numerous covers and tributes.
Videos at the link. I especially like the Smurf version.
Market Street, San Francisco, April 14, 1906
An evening pause: This film footage has been circulating about on the web for several years. I even think I posted it previously but can’t find that post now. Either way, it was shot mere days before the San Francisco earthquake, and provides us a window into the reality of life then. The sound effects add to the reality, though they are not original to the time. They were added later and were dubbed in with what I think was great care. See the notes here for more details.
Hat tip Edward Thelen.
If you own a gun stay out of New Jersey
Fascism in New Jersey: A Philadelphia mom with a permit and legal gun makes the mistake of taking it into New Jersey and now faces 3 to 5 years in prison.
If Chris Christie wants to seriously run for president, he should be commuting every single one of these cases as they appear in the press.
A volcano eruption on Io
In 2013 the ground-based Gemini telescope imaged a gigantic volcanic eruption on Jupiter’s moon Io.
More here, including information on two other eruptions that occurred about the same time.
The oldest known common-place items.
The link is here.
The library that tried to ban conservative news researchers backs down.
Victory for free speech: The University of Arkansas has backed down from its attempt to ban a news research team because it was using that research to publish articles critical of Hillary Clinton.
The University of Arkansas library has backed down from its decision to block the Washington Free Beacon from accessing its special collections archives following a month-long public uproar. The library suspended the Free Beaconโs research privileges in June after the outlet published a story based on audiotapes from university archives that included Hillary Clinton discussing her 1975 defense of a child rapist.
The article clearly documents that the university was working on behalf of Hillary Clinton and the Democratic Party, trying to impose the ban for political reasons.
News crew threatened with arrest if they didn’t turn over their footage
Free speech in modern America: A news crew filming was temporarily detained and threatened with arrest on July 24 for filming at a national park.
Watch the video below the fold. The arrogance and ignorance of the Constitution by these officers is appalling.
» Read more
Scientists struggle with earthquake data in the Pacific northwest
The uncertainty of science: A second look at cores drilled in the Pacific northwest has raised doubts about the previous conclusions that the region faces the threat of megaquakes every few centuries.
The bottom line is that though geologists are very confident the northwest faces the threat of future quakes, they can’t yet predict with any confidence their rate or intensity.
The next U.S. Mars rover will try to make and store oxygen
Of the seven science instruments proposed for the next U.S. Mars rover, scheduled for a 2020 launch date, MOXIE test the engineering to produce and store oxygen, pulled from the Martian atmosphere.
Developed in partnership with NASAโs Jet Propulsion Laboratory, itโs based on the fact that the Martian atmosphere, though extremely thin, is composed of 96 percent carbon dioxide, which means its a vast potential source of oxygen for future explorers and settlers. Essentially, MOXIE is a fuel cell in reverse. Instead of generating electricity by using oxygen to burn a fuel, it uses a process called solid oxide electrolysis , where electricity is employed to split carbon dioxide into oxygen and carbon monoxide.
This process would see Martian air pumped into the unit through a dust filter and pressurized before being passed into a fuel cell. At high temperatures, some ceramic oxides act as oxygen ion conductors. In the fuel cell, a thin, non-porous disc of this ceramic separates two porous electrodes. One electrode acts as the cathode and the other as the anode. Carbon dioxide passes through the cathode and when it comes into contact with the ceramic, the interaction of electricity and the ceramic causes the carbon dioxide to split into oxygen and carbon monoxide. The oxygen and the carbon monoxide are then separated and the oxygen stored.
What makes this unusual is that NASA has actually dedicated one science instrument to engineering research, not pure science. The agency does not do this much anymore, but such research is essential if the U.S. is going to someday send humans to other planets.
Ukraine tensions disrupt more U.S.-Russian science
It appears that several U.S. scientists have been forced to cancel their appearances at science conferences in Russia because of the increased tension between the U.S. and Russia over Ukraine.
The disruptions seem to be almost random and are not being applied across the board, as the story also notes that many other programs are not being affected at all.