Hunting meteorites in the medieval Middle East and getting imprisoned because of it
Hunting meteorites in the medieval Middle East and getting imprisoned because of it.
Tag: science
Mining the moon for water and nuclear fuel
Mining the moon for water and fuel.
Texas-based Shackleton Energy Company has already begun operations aimed at mining the Moon within the next few years. The company’s plans for mining and refining operations would involve melting the ice and purifying the water, converting the water into gaseous hydrogen and oxygen, and then condensing the gases into liquid hydrogen, liquid oxygen and hydrogen peroxide, all potential rocket fuels.
Shackleton CEO Dale Tietz says the water extracted would be used almost exclusively as rocket fuel to power operations both within Low Earth Orbit (LEO) – such as space tourism and the removal of space-debris – on the Moon, and further out into space. ‘We are a for-profit business enterprise moving forward, and so we are only going there really for one reason and that is to mine, prospect mine and harvest water for rocket propellant production,’ says Tietz.
Getting rare-earth elements from ocean floor mud
Getting rare-earth elements, needed for electronics, from ocean floor mud?
First ARTEMIS Spacecraft Successfully Enters Lunar Orbit
The first of two ARTEMIS spacecraft has successfully entered lunar orbit.
Dawn’s approach to Vesta continues
Dawn’s approach to Vesta continues.
Starting at the beginning of the approach phase on May 3, Dawn interrupted thrusting once a week to photograph Vesta against the background stars. These images help navigators determine exactly where the probe is relative to its target. This technique does not replace other means of navigation but rather supplements them. One of the principal methods of establishing the spacecraft’s trajectory relies on accurately timing how long it takes radio signals, traveling, as all readers know, at the universal limit of the speed of light, to make the round trip between Earth and Dawn. Another uses the Doppler shift of the radio waves, or the slight change in pitch caused by the craft’s motion. These sensitive measurements remain essential to navigating the faraway ship as it sails the interplanetary seas.
Despite the very slow approach, the distance is small enough now that observing Vesta weekly is no longer sufficient. To achieve the navigational accuracy required to reach the intended orbit in early August, last week the frequency of imaging was increased to twice per week. In each session, half of the pictures are taken with long exposures to ensure many stars are detectable, thus overexposing the much brighter disc of the nearby Vesta. The other half use short exposures to ensure that the rocky world shows up correctly so its precise location can be measured. The visible and infrared mapping spectrometer has been commanded to observe Vesta during three of these sessions, each time providing valuable information that will help scientists select instrument settings for when Dawn is close enough to begin its detailed scientific measurements.
More delays for the James Webb Space Telescope?
More delays for the James Webb Space Telescope?
Everything Bad is Good For You
An independent panel of scientists has found that a $1.4 billion plan put forth by environmentalists to save the salmon of the northwest by destroying four hydroelectric dams and restricting water use was based on junk science.
An independent panel of scientists has found that a $1.4 billion plan put forth by environmentalists to save the salmon of the northwest by destroying four hydroelectric dams and restricting water use was based on junk science.
According to the just-released 350-page assessment, funded by the Fish and Wildlife Service, experts expressed “strong reservations” that the expensive effort could significantly increase the Chinook salmon population in the Klamath River system. . . . The report also states, “There are many pieces of information we do not know about the Klamath system, and none we know with absolute certainty. The process of developing the model, trying to reproduce historical conditions … must be internally consistent.”
NJ legislature passes ban on fracking, while NY considers lifting its ban
Who wins? NJ legislature has passed a ban on fracking for natural gas, while NY has moved to lift its ban.
Breathtaking view of the central peak of Tycho Crater
Another astonishing space photograph, this time from lunar orbit, taken by Lunar Reconnaissance Orbiter on June 11, 2011.
The image looks down at the central peak of Tycho crater, with enough detail to make out individual boulders at the summit. Go the link to see some closeups.
Mysterious Light Burst Captured by Hawaii Telescope
Mysterious bubble of light, caused by military suborbital rocket, captured by Hawaii telescopes.
‘Dirty hack’ restores Cluster mission from near loss
A “dirty hack” has restored the Cluster solar wind mission from near loss.
Cassini looks past one Saturn moon to another
The image below was taken on January 11, 2011 by the space probe Cassini, in orbit around Saturn. First we see the southern polar regions of the moon Rhea, 949 miles in diameter. Beyond is the moon Dione, 698 miles across, appearing to sit on the rings of Saturn.
As far as I am concerned, this image, as well as almost every other image from Cassini, proves that any hotel built in orbit around Saturn is unquestionably going to be one of the hottest tourist spots in the solar system.
The Japanese solar sail Ikaros continues to function, more than 100 million miles from Earth
The Japanese solar sail Ikaros continues to function, more than 100 million miles from Earth.
Discovering the original colors of fossils
A new technique gives clues to the original living colors of ancient fossils.
A massive Windows botnet “almost indestructible,” say researchers
A massive Windows botnet is “almost indestructible,” say researchers.
The most distant quasar ever found
Astronomers have found the most distant quasar ever, and are baffled by its existence.
The light from the quasar started its journey toward us when the universe was only 6% of its present age, a mere 770 million years after the Big Bang, at a redshift of about 7.1 [3]. “This gives astronomers a headache,” says lead author Daniel Mortlock, from Imperial College London. “It’s difficult to understand how a black hole a billion times more massive than the Sun can have grown so early in the history of the universe. It’s like rolling a snowball down the hill and suddenly you find that it’s 20 feet across!”
Obama and Republicans in agreement: Senate should cancel next week’s vacation
Obama and Republicans in agreement: The Senate should cancel next week’s vacation.
Richard Feynman talks about light
An evening pause: “The inconceivable nature of nature.”
Biosphere 2 gets a new owner and a boost in funding
Biosphere 2 gets a new owner and a boost in funding.