- Jul 8, 2003
The universe likes to play coy about its age, but astronomers believe they have a pretty good idea of the range. Now, a series of new studies has investigated the question using different methods – and they’ve come up with two different answers, separated by more than a billion years.
Currently, the most widely accepted age for the universe is around 13.8 billion years, but determining the age of … well, everything, is no easy feat. There are several key calculations that need to be done, and checked against each other. The problem is, these can be figured out in different ways, resulting in different answers.
Two teams of astronomers have made a compelling case in the 33-year-old mystery surrounding Supernova 1987A. Based on observations of the Atacama Large Millimeter/submillimeter Array (ALMA) and a theoretical follow-up study, the scientists provide new insight for the argument that a neutron star is hiding deep inside the remains of the exploded star. This would be the youngest neutron star known to date.
The Voyager spacecraft are still functioning 42 years after launch, and NASA recently announced a plan to keep these intrepid space travelers functioning as they continue their journeys beyond the Solar System. However, as power on each of the two craft continues to dwindle, difficult decisions need to be made soon regarding the future of the most-traveled spacecraft ever produced by humans.
SpaceX’s Crew Dragon capsule pulled away from the International Space Station today to begin the homeward flight for NASA astronauts Doug Hurley and Bob Behnken, even as Hurricane Isaias headed for Florida’s Atlantic coast.
Fortunately, SpaceX’s Dragon capsule is heading for waters off Florida’s other coast.
Two NASA astronauts splashed down safely in the Gulf of Mexico Sunday for the first time in a commercially built and operated American crew spacecraft, returning from the International Space Station to complete a test flight that marks a new era in human spaceflight.
Balloons may seem like an outdated mode of transportation, but for high-flying scientific instruments they’re making a comeback. NASA has unveiled ASTHROS, a new infrared telescope that will be carried to the edge of space by a balloon the size of a football stadium.
ASTHROS, short for Astrophysics Stratospheric Telescope for High Spectral Resolution Observations at Submillimeter-wavelengths, will view the cosmos in far-infrared light. These wavelengths are blocked by Earth’s atmosphere, so infrared observatories are usually space-based, such as Spitzer, Herschel, and the Infrared Space Observatory.
Scientists said Tuesday they had discovered a way to detect space debris even in daylight hours, potentially helping satellites to avoid the ever-growing cloud of junk orbiting the planet.
The estimated 500,000 objects circling the globe range in size from a single screw to an entire rocket fuel tank.
While its feats flying astronauts to and from the International Space Station rightly generate a lot of the headlines, the SpaceX team has been busily working on the vehicle that could take humans well past this point in low-Earth orbit. Development of this Starship spacecraft continues at the company’s Boca Chica site in Texas, where the team just performed a 150-meter (500-ft) hop test of a full-size prototype.
NASA’s first asteroid sampling spacecraft is making final preparations to grab a sample from asteroid Bennu’s surface. Next week, the OSIRIS-REx mission will conduct a second rehearsal of its touchdown sequence, practicing the sample collection activities one last time before touching down on Bennu this fall.
A NASA spacecraft has observed a pulsing glow coming from Mars. Huge spots of ultraviolet light were seen in the night sky, pulsing with uncanny regularity – exactly three times every night. The find highlights (literally) the atmospheric processes and circulation patterns of the Red Planet.
But it’s the specificity of the light that’s most intriguing. MAVEN data revealed that the UV light only shows up during the Martian spring and fall seasons, and it pulses exactly three times each night. The show begins just after sunset and it’s all over by midnight.
forwarded this to Le Twit who is VERY heavy into physics....essentially isnt this a rail gun?Here's a little Physics/Math thing Tim...
This electromagnetic catapult flings airplanes into the sky (and giant sleds into the water). Here's how to calculate the projectile motion involved.
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