The mysterious spokes in Saturn’s rings, discovered by the Voyager craft back in the 1980s, still persist today in Cassini images.
Scientists think they occur as the ring particles interact with Saturn’s magnetic field, but that remains largely an as yet unproven theory.
Archeologists think they have located the wreck of Christopher Columbus flagship, the Santa Maria, from his 1492 voyage.
The U.S.’s most capable deep-sea unmanned research sub has been lost more than six miles deep in the Pacific.
The creation in the lab of an as yet unnamed superheavy element adds weight to the theory that there might exist even heavier elements that are stable in nature.
The scientists did not observe element 117 directly. Instead, they searched for its daughter products after it radioactively decayed by emitting alpha particles—helium nuclei with two protons and two neutrons. “The heavy nuclei makes an alpha decay to produce element 115, and this also decays by alpha decay,” says Jadambaa Khuyagbaatar of GSI, lead author of a paper reporting the results published on 1 May in Physical Review Letters.
After a few more steps in this decay chain, one of the nuclei produced is the isotope lawrencium 266—a nucleus with 103 protons and 163 neutrons that had never been seen before. Previously known isotopes of lawrencium have fewer neutrons, and are less stable. This novel species, however, has an astonishingly long half-life of 11 hours, making it one of the longest-lived superheavy isotopes known to date. “Perhaps we are at the shore of the island of stability,” Düllmann says.
If these superheavy elements could be created, they would be the stuff of science fiction. They might have properties that we would find extremely useful.
The uncertainty of science: It turns out that the object dubbed G2 that is zipping past the Milky Way’s central black hole is behaving not like a cloud but more like a star.
The latest observations by the Keck Observatory in Hawaii show that the gas cloud called “G2” was surprisingly still intact, even during its closest approach to the supermassive black hole at the center of our Milky Way galaxy. Astronomers from the UCLA Galactic Center Group reported today that observations obtained on March 19 and 20, 2014 show the object’s density was still “robust” enough to be detected. This means G2 is not just a gas cloud, but likely has a star inside.
When I wrote a piece about this object for Sky & Telescope I found that among astronomers there was great skepticism about it being just a gas cloud that would be ripped apart when it flew past the black hole. The early data was not conclusive, but enough of it suggested G2 was a star, not a cloud. It turns out here that the skeptics were right.
For the first time astronomers think they have measured the rotation rate of an exoplanet, thus determining the length of its day.
Ignas Snellen and his colleagues at Leiden University in the Netherlands report in Nature1 that a gaseous planet orbiting the star β Pictoris rotates at 25 kilometres per second at its equator — faster than any planet in the Solar System and about 50 times faster than Earth. A day on the planet, called β Pictoris b, lasts just over eight hours, even though the planet has a diameter more than 16 times that of Earth’s and carries more than 3,000 times Earth’s heft.
This result falls under my category of “the uncertainty of science.” Though quite cool, and based on real data, the uncertainties are great. Don’t bet the house that this result will stand up to closer observations in the future.
A brown dwarf star has been discovered only 7.2 light years away.
This makes it the fourth closest interstellar neighbor to the Sun.
Chicken Little was wrong! A new study confirms that increased atmospheric carbon dioxide lengthens the plant growing season.
Previous studies have documented a lengthening of the growing season in many parts of the world. In the United States, the time between the last spring frost and the first autumn freeze has gone up by nearly two weeks since 19002; in Europe, a study of more than 540 plant species found that, on average, spring events such as flowering had shifted about a week earlier from 1971 to 2000, and the onset of autumn had been pushed back by about four days3.
Such shifts have long been attributed to warming temperatures. But CO2 also plays a part, says study co-author Heidi Steltzer, an ecosystem ecologist at Fort Lewis College in Durango, Colorado.
Putting aside the uncertainty about whether carbon dioxide can even cause global warming, the assumption that global warming itself will be a bad thing has never been demonstrated clearly, while there is evidence that it might actually be beneficial.
Penny wise, pound foolish: Budget issues continue to threaten a number of successfully functioning science spacecraft, including Opportunity on Mars and Lunar Reconnaissance Orbiter circling the Moon.
Don’t be surprised if NASA announces soon that they are shutting down these spacecraft so they can save some money. Or as the article notes, “Money not spent on these extended missions will probably slide into [the Science Mission Directorate’s] Black Hole of Funding (the James Webb Space Telescope) or be dissipated on new paperwork, committee meetings and concept studies.”
According to a new study, Chelyabinsk-scale meteorite impacts happen more often than we have been aware.
The bright flare of the Russian meteor was hard to miss, and left 1,200 people injured in February 2013. What the human eye missed was two separate high-altitude explosions that occurred over Argentina and the North Atlantic Ocean just months later. That’s according to data from an infrasound network used to track nuke tests, released Tuesday by the B612 Foundation.
The data shows that there were 26 comparable events since 2000.
Having completed more than 3,000 orbits around Mercury, Messenger’s orbit is now being lowered to just under 125 miles from the surface.
Red tape appears to be preventing the U.S. military from releasing meteorite data obtained by its nuclear test monitoring system.
Details of atmospheric meteor explosions, as recorded by U.S. military spacecraft sensors, were posted on a publicly accessible NASA website run by the Jet Propulsion Laboratory (JPL) in Pasadena, Calif. In fact, the military-civil cooperation was spurred by the details of the February 2013 fireball explosion over Chelyabinsk, Russia — termed a “superbolide” event. The website postings are designed to assist the scientific community’s investigation of bolides, or exceptionally bright fireballs.
However, multiple scientists noted that the JPL website had not been updated recently. That presumably meant that there was some sort of delay, as some fairly big events were detected by infrasound in the last year. “Because of budget and personnel reductions on our military partner, they ran into workforce issues to accomplish this task,” said Lindley Johnson, NEO program executive within the Planetary Science Division of NASA’s Science Mission Directorate in Washington, D.C.
In other words, it looks like everyone in the military is saying “Ain’t my job, man!” so it doesn’t get done. They need to assign someone the job and be done with it.
Crying wolf! A history of global warming “Tipping Points” where it was declared that doomsday was certain in only a few years if we didn’t act now.
The article is quite hilarious. Again and again and again and again the climate fear-mongers have announced with absolute certainty that, unless we pass draconian government regulations, the climate was going to go crazy and we were all going to die. Sometimes they declared we only had hours, sometimes months, sometimes years, sometimes even decades, but every time they were certain they knew what was going to happen and thus we had better obey them. And anyone who dared question their certainty was worse than a fool and should be imprisoned!
Of course, none of these predictions have proven true. The climate might yet warm and even go wild, but none of these doom-sayers have done any of us any good. If things do start going bad in future years, it is now going to be very difficult to convince anyone of this fact.
Posted from Tucson International Airport. I am on the way to Denver to tape two television interviews with George Noory of Coast to Coast for his television show, Beyond Belief. Should be fun.
The crashes that changed aviation and plane designs forever.
Like the 1964 Alaska earthquake, sometimes bad things have to happen to force humans to face a problem and fix it.
How the 1964 Alaska Earthquake shook up geology.
Sometimes the shake-up isn’t physical it is mental. In this case, the 1964 Alaska quake forced geologists to finally take serious the theory of continental drift and plate tectonics.
Worlds without end: The existence of a Kepler-found earth-sized planet in the habitable zone has been confirmed.
The newfound planet, called Kepler-186f, was first spotted by NASA’s Kepler space telescope and circles a dim red dwarf star about 490 light-years from Earth. While the host star is dimmer than Earth’s sun and the planet is slightly bigger than Earth, the positioning of the alien world coupled with its size suggests that Kepler-186f could have water on its surface, scientists say.
In this new work, the Keck and Gemini ground-based telescopes confirmed Kepler’s discovery.
The EPA admits that it does not have the data to justify its environmental regulations.
The EPA was subpoenaed by Congress for the data it uses, and they responded to say that what they have doesn’t really provide any proof that their regulations are necessary. But they then add that they are going to continue imposing their regulations anyway.
Has Cassini spotted the formation of a new Saturn moon?
Check out the image. Quite fascinating, though the uncertainties here are quite large.
The uncertainty of science: New research suggests that, in general, Mars has always been too cold to harbor liquid water on its surface for long periods.
Mars’ atmosphere was probably never thick enough to keep temperatures on the planet’s surface above freezing for the long term, suggests research published today in Nature Geoscience1. Although the planet’s topography indicates that liquid water has flooded Mars in the distant past, evidence increasingly suggests that those episodes reflect occasional warm spells, not a consistently hospitable phase of the planet’s history.
The research does not say that liquid water never flowed on the Martian surface, only that such events were short-lived. They looked at craters and noted that the surface has impacts from meteorites that would not have survived to the surface had the atmosphere been thick enough for liquid water.
The research however did not address Mars’ relatively smooth northern hemisphere, where there are not a lot of craters and where some scientists think there might once have been a shallow ocean. If Mars never had liquid water for long periods, why does this area lack craters?
