Tag: science
A new type of supernova.
The strange polar vortexes of Venus.
The strange polar vortexes of Venus.
The large-scale cyclone extends vertically in Venus’ atmosphere over more than 20 kilometers, through a region of highly turbulent, permanent clouds. However, the centers of rotation at two different altitude levels (42 and 62 km above the surface) are not aligned and both wander around the south pole of the planet with no established pattern at velocities of up to 55km/h. The study also finds that even when averaged cross-winds are roughly the same at both altitudes, there is still a strong vertical gradient, with winds increasing by as much as 3km/h for every kilometer of height and leading to possible atmospheric instabilities.
The strange polar vortexes of Venus.
The large-scale cyclone extends vertically in Venus’ atmosphere over more than 20 kilometers, through a region of highly turbulent, permanent clouds. However, the centers of rotation at two different altitude levels (42 and 62 km above the surface) are not aligned and both wander around the south pole of the planet with no established pattern at velocities of up to 55km/h. The study also finds that even when averaged cross-winds are roughly the same at both altitudes, there is still a strong vertical gradient, with winds increasing by as much as 3km/h for every kilometer of height and leading to possible atmospheric instabilities.
Curiosity marks the return to full science operations by producing a new panorama.
Curiosity marks the return to full science operations by producing a new panorama.
Curiosity marks the return to full science operations by producing a new panorama.
Curiosity is out of safe mode and will be resuming full science operations by next week.
Curiosity is out of safe mode and will be resuming full science operations by next week.
It is imperative that the engineers clear up these computer problems now, as communications with the rover will be limited in April because the sun will be in the way.
Transmissions from Earth to the orbiters [Mars Odyssey and Mars Reconnaissance Orbiter] will be suspended while Mars and the sun are two degrees or less apart in the sky, from April 9 to 26, with restricted commanding during additional days before and after. Both orbiters will continue science observations on a reduced basis compared to usual operations. Both will receive and record data from the rovers. Odyssey will continue transmissions Earthward throughout April, although engineers anticipate some data dropouts, and the recorded data will be retransmitted later.
The Mars Reconnaissance Orbiter will go into a record-only mode on April 4. “For the entire conjunction period, we’ll just be storing data on board,” said Deputy Mission Manager Reid Thomas of JPL. He anticipates that the orbiter could have about 40 gigabits of data from its own science instruments and about 12 gigabits of data from Curiosity accumulated for sending to Earth around May 1.
NASA’s Mars Exploration Rover Opportunity is approaching its fifth solar conjunction. Its team will send no commands between April 9 and April 26. The rover will continue science activities using a long-term set of commands to be sent beforehand.
Curiosity is out of safe mode and will be resuming full science operations by next week.
It is imperative that the engineers clear up these computer problems now, as communications with the rover will be limited in April because the sun will be in the way.
Transmissions from Earth to the orbiters [Mars Odyssey and Mars Reconnaissance Orbiter] will be suspended while Mars and the sun are two degrees or less apart in the sky, from April 9 to 26, with restricted commanding during additional days before and after. Both orbiters will continue science observations on a reduced basis compared to usual operations. Both will receive and record data from the rovers. Odyssey will continue transmissions Earthward throughout April, although engineers anticipate some data dropouts, and the recorded data will be retransmitted later.
The Mars Reconnaissance Orbiter will go into a record-only mode on April 4. “For the entire conjunction period, we’ll just be storing data on board,” said Deputy Mission Manager Reid Thomas of JPL. He anticipates that the orbiter could have about 40 gigabits of data from its own science instruments and about 12 gigabits of data from Curiosity accumulated for sending to Earth around May 1.
NASA’s Mars Exploration Rover Opportunity is approaching its fifth solar conjunction. Its team will send no commands between April 9 and April 26. The rover will continue science activities using a long-term set of commands to be sent beforehand.
New results show that the effectiveness of a new malaria vaccine fades after a period of years.
New results show that the effectiveness of a new malaria vaccine fades after a period of years.
The vaccine is expensive, but its use does seem to reduce the number of children who get malaria. The problem thus will be to balance cost with effectiveness, which is never an easy thing to do.
New results show that the effectiveness of a new malaria vaccine fades after a period of years.
The vaccine is expensive, but its use does seem to reduce the number of children who get malaria. The problem thus will be to balance cost with effectiveness, which is never an easy thing to do.
After 35 years of travel, Voyager 1 has finally left the solar system.
After 35 years of travel, Voyager 1 has finally left the solar system.
There is still some dispute among scientists about this, but the evidence seems clear that the spacecraft has entered regions outside the influence of our solar system.
Update: Since this morning the scientists seem to be backtracking. They now claim that Voyager 1 has not left the solar system.
After 35 years of travel, Voyager 1 has finally left the solar system.
There is still some dispute among scientists about this, but the evidence seems clear that the spacecraft has entered regions outside the influence of our solar system.
Update: Since this morning the scientists seem to be backtracking. They now claim that Voyager 1 has not left the solar system.
A new model of the origin of asteroids suggests that in the beginning they weren’t rubble piles but “churning balls of mud.”
A new model of the origin of asteroids suggests that in the beginning they weren’t rubble piles but “churning balls of mud.”
A new model of the origin of asteroids suggests that in the beginning they weren’t rubble piles but “churning balls of mud.”
Having lost its earmarked government funding in 2011, the Pan-STARRS telescope has now replaced those funds with a private donation.
We don’t need no stinking government: Having lost its earmarked government funding in 2011, the Pan-STARRS telescope has now replaced those funds with a private donation.
I find it interesting that while the lost government funds equaled $10 million, they are now able to achieve essentially the same goals with a private donation of only $3 million. This suggests, not surprisingly, that there was a lot of extra pork in the government funds that the facility could manage without.
We don’t need no stinking government: Having lost its earmarked government funding in 2011, the Pan-STARRS telescope has now replaced those funds with a private donation.
I find it interesting that while the lost government funds equaled $10 million, they are now able to achieve essentially the same goals with a private donation of only $3 million. This suggests, not surprisingly, that there was a lot of extra pork in the government funds that the facility could manage without.
Google Street View now includes views from four of the world’s seven largest mountain peaks.
Google Street View now includes views from four of the world’s seven largest mountain peaks.
More here.
Google Street View now includes views from four of the world’s seven largest mountain peaks.
More here.
Curiosity takes a panorama of Mount Sharp.
Curiosity takes a panorama of Mount Sharp.
A white balanced version, which isn’t as much like true color but looks better, can be found here.
Curiosity takes a panorama of Mount Sharp.
A white balanced version, which isn’t as much like true color but looks better, can be found here.
The 6 most ridiculous science experiments ever funded
The 6 most ridiculous science experiments ever funded.
I especially like the one that definitively proved “there is absolutely no difference between a college student and a horny chicken.”
The 6 most ridiculous science experiments ever funded.
I especially like the one that definitively proved “there is absolutely no difference between a college student and a horny chicken.”
Water and carbon monoxide detected in the atmosphere of a super-sized exoplanet 129 light years away.
Water and carbon monoxide have been detected in the atmosphere of a super-sized exoplanet 129 light years away.
Water and carbon monoxide have been detected in the atmosphere of a super-sized exoplanet 129 light years away.
Europe today inked a partnership deal with Russia for its two spacecraft ExoMars mission, planned to launch in 2016 and 2018.
Europe today inked a partnership deal with Russia for its two spacecraft ExoMars mission, planned to launch in 2016 and 2018.
Russia essentially replaces the United States, which backed out of the deal last year when the Obama administration eliminated the funding for most of NASA’s planetary program.
Europe today inked a partnership deal with Russia for its two spacecraft ExoMars mission, planned to launch in 2016 and 2018.
Russia essentially replaces the United States, which backed out of the deal last year when the Obama administration eliminated the funding for most of NASA’s planetary program.
Astronomers today celebrate the official turning-on of ALMA, the world’s largest telescope.
Astronomers today celebrate the official turning-on of ALMA, the world’s largest telescope.
ALMA is an array of 66 dishes tuned to wavelengths in the millimeter to submillimeter range of the electromagnetic spectrum, between the infrared and radio frequencies.
Astronomers today celebrate the official turning-on of ALMA, the world’s largest telescope.
ALMA is an array of 66 dishes tuned to wavelengths in the millimeter to submillimeter range of the electromagnetic spectrum, between the infrared and radio frequencies.
Computer simulations suggest that Pluto might have as many as ten undiscovered additional moons.
Computer simulations suggest that Pluto might have as many as ten undiscovered additional moons.
The planet already has five, so if this is true space is really crowded there, which might pose a problem for the New Horizons spacecraft that plans to fly past in 2015.
Computer simulations suggest that Pluto might have as many as ten undiscovered additional moons.
The planet already has five, so if this is true space is really crowded there, which might pose a problem for the New Horizons spacecraft that plans to fly past in 2015.
Hoyer told employees at the Goddard Space Flight Center yesterday that sequester might force some layoffs there.
My heart bleeds: Congressman Steny Hoyer (D-Maryland) told employees at the Goddard Space Flight Center yesterday that sequester might force some layoffs there.
So, who does Hoyer work for, the employees at Goddard or the taxpayer? He apparently thinks he is the union rep for government employees.
My heart bleeds: Congressman Steny Hoyer (D-Maryland) told employees at the Goddard Space Flight Center yesterday that sequester might force some layoffs there.
So, who does Hoyer work for, the employees at Goddard or the taxpayer? He apparently thinks he is the union rep for government employees.
Curiosity’s first drilling sample has found that the ancient watery conditions in Gale Crater were especially suitable for life.
Curiosity’s first drilling sample has found that the ancient watery conditions in Gale Crater were especially suitable for life.
Curiosity’s first drilling sample has found that the ancient watery conditions in Gale Crater were especially suitable for life.
The budget battle at NASA
Two stories today highlight not only the budget problems at NASA, but also illustrate the apparent unwillingness of both Congress and Americans to face the terrible budget difficulties of the federal government. In both cases, the focus is instead on trying to fund NASA at levels comparable to 2012, before the Obama administration or sequestration had imposed any budget cuts on the agency.
It is as if we live in a fantasy world, where a $16 trillion dollar debt does not exist, and where money grows on trees and we can spend as much as we want on anything we want.
» Read more
Astronomers discover a trinary — of quasars.
Astronomers discover a trinary — of quasars.
Astronomers discover a trinary — of quasars.
WISE has uncovered a binary brown dwarf star system only 6.5 light years away
Data from WISE has uncovered a binary brown dwarf star system only 6.5 light years away, the closest found in almost a century and the third closest overall.
Data from WISE has uncovered a binary brown dwarf star system only 6.5 light years away, the closest found in almost a century and the third closest overall.
Four asteroids buzzed the Earth this past week.
Chicken Little Report: Four asteroids buzzed the Earth this past week.
I suspect that the increase in detected asteroids is not because there are more of them but because our ability to detect them continues to improve.
Chicken Little Report: Four asteroids buzzed the Earth this past week.
I suspect that the increase in detected asteroids is not because there are more of them but because our ability to detect them continues to improve.
How to see Comet Pan-STARRS.
Seven sound recordings made before Thomas Edison.
Seven sound recordings made before Thomas Edison.
Seven sound recordings made before Thomas Edison.
New computer models find that the tropical rain forests will not be harmed by increased carbon dioxide in the atmosphere.
The uncertainty of science: New computer models find that the tropical rain forests will not be harmed by increased carbon dioxide in the atmosphere.
Tropical forests are unlikely to die off as a result of the predicted rise in atmospheric greenhouse gases this century, a new study finds. The analysis refutes previous work that predicted the catastrophic loss of the Amazon rainforest as one of the more startling potential outcomes of climate change.
In the most extensive study of its kind, an international team of scientists simulated the effect of business-as-usual emissions on the amounts of carbon locked up in tropical forests across Amazonia, Central America, Asia and Africa through to 2100. They compared the results from 22 different global climate models teamed with various models of land-surface processes. In all but one simulation, rainforests across the three regions retained their carbon stocks even as atmospheric carbon dioxide concentration increased throughout the century.
The study provides “robust evidence for the resilience of tropical rainforests”, says lead author Chris Huntingford, a climate modeller at the UK’s Centre for Ecology and Hydrology in Wallingford. But uncertainties remain, he adds.
First, this prediction is based on a computer model, which is as likely to be as right as the previous pessimistic predictions. With that in mind, no one should start dancing for joy. The long term consequences of increased carbon dioxide in the atmosphere remain unknown.
Second, I am baffled by the previous predictions that favored catastrophe for the tropical jungles because of increased levels of carbon dioxide. Plants breath CO2. They prosper from it. If you put more in the atmosphere they will thrive. Moreover, the tropical jungles are already hot, and the plant life there is adapted to that heat. Raising the global temperature should not hurt them significantly.
Finally, faced with a result that defuses all the crisis-mongering of the global warming crowd, the author of the article feels obliged at the end to emphasis their new bugaboo: extreme weather! It’s coming! Duck your heads!
But don’t worry. When weather extremes also fail to appear, they will find something else to scream about.
The uncertainty of science: New computer models find that the tropical rain forests will not be harmed by increased carbon dioxide in the atmosphere.
Tropical forests are unlikely to die off as a result of the predicted rise in atmospheric greenhouse gases this century, a new study finds. The analysis refutes previous work that predicted the catastrophic loss of the Amazon rainforest as one of the more startling potential outcomes of climate change.
In the most extensive study of its kind, an international team of scientists simulated the effect of business-as-usual emissions on the amounts of carbon locked up in tropical forests across Amazonia, Central America, Asia and Africa through to 2100. They compared the results from 22 different global climate models teamed with various models of land-surface processes. In all but one simulation, rainforests across the three regions retained their carbon stocks even as atmospheric carbon dioxide concentration increased throughout the century.
The study provides “robust evidence for the resilience of tropical rainforests”, says lead author Chris Huntingford, a climate modeller at the UK’s Centre for Ecology and Hydrology in Wallingford. But uncertainties remain, he adds.
First, this prediction is based on a computer model, which is as likely to be as right as the previous pessimistic predictions. With that in mind, no one should start dancing for joy. The long term consequences of increased carbon dioxide in the atmosphere remain unknown.
Second, I am baffled by the previous predictions that favored catastrophe for the tropical jungles because of increased levels of carbon dioxide. Plants breath CO2. They prosper from it. If you put more in the atmosphere they will thrive. Moreover, the tropical jungles are already hot, and the plant life there is adapted to that heat. Raising the global temperature should not hurt them significantly.
Finally, faced with a result that defuses all the crisis-mongering of the global warming crowd, the author of the article feels obliged at the end to emphasis their new bugaboo: extreme weather! It’s coming! Duck your heads!
But don’t worry. When weather extremes also fail to appear, they will find something else to scream about.
The Russians now say that they have not found any previously unknown life forms in the sample from Lake Vostok.
The uncertainty of science: The Russians now say that they have not found any previously unknown life forms in the sample from Lake Vostok.
Sergei Bulat of the genetics laboratory at the Saint Petersburg Institute of Nuclear Physics had said Thursday that samples obtained from the underground Lake Vostok in May 2012 contained a bacteria bearing no resemblance to existing types. But the head of the genetics laboratory at the same institute said on Saturday that the strange life forms were in fact nothing but contaminants.
It appears that the earlier announcement was either premature, or inappropriate.
The uncertainty of science: The Russians now say that they have not found any previously unknown life forms in the sample from Lake Vostok.
Sergei Bulat of the genetics laboratory at the Saint Petersburg Institute of Nuclear Physics had said Thursday that samples obtained from the underground Lake Vostok in May 2012 contained a bacteria bearing no resemblance to existing types. But the head of the genetics laboratory at the same institute said on Saturday that the strange life forms were in fact nothing but contaminants.
It appears that the earlier announcement was either premature, or inappropriate.
Comet Pan-STARRS will likely be its brightest for northern hemisphere viewers this weekend.
Comet Pan-STARRS will likely be at its brightest for northern hemisphere viewers this weekend.
Look to the west low on the horizon at sunset to see it.
Comet Pan-STARRS will likely be at its brightest for northern hemisphere viewers this weekend.
Look to the west low on the horizon at sunset to see it.
Sand that is always dry
An evening pause: As Arthur Clarke said, “Any sufficiently advanced technology is indistinguishable from magic.”
Eight of the world’s most incredible swimming pools.
The Crab Nebula has flared again.
The Crab Nebula has flared again.
The Crab Nebula has flared again.
The Russians have announced that their samples from Lake Vostok, buried deep under the Antarctic icecap contains life, one of which is new.
The Russians have announced that their samples from Lake Vostok, buried deep under the Antarctic icecap, contains life, one of which is never before seen.
The Russians have announced that their samples from Lake Vostok, buried deep under the Antarctic icecap, contains life, one of which is never before seen.