Hubble takes its best image yet of Eta Carina
Preview of a someday supernova: Hubble takes its best image yet of Eta Carinae.
Tag: astronomy
A supernova twenty-five years later.
A supernova twenty-five years later.
SN 1987A, it turns out, was like a dust-bomb, with estimates of the total dust it threw into space, based on the infrared brightness of the dust … implying enough dusty material to build the equivalent of 200,000 Earth-mass planets. Mingled within the dust are elements as diverse as oxygen, nitrogen, sulphur, silicon, carbon and iron. This immense amount of dust has been beyond expectations and, if all supernovae spew out this much dust, it helps explain why young galaxies that we can see existing in the early Universe, which have high rates or star birth and death, are so dusty. The dust, however, isn’t a nuisance to be wiped away – this is the material that goes into building new planets, moons and even life. The iron in your blood and the calcium in your bones all came from supernovae like SN 1987A, as mostly did the oxygen we breath and the carbon in our constituent molecules.
Buckyballs in space
Buckyballs in space. And they’re solid too!
A world made of water
A world made of water.
And it ain’t in our solar system.
A look at the universe’s dark side
A look at the universe’s dark side.
Mapping the surface of an extrasolar planet light years away.
Mapping the surface of an extrasolar planet light years away. From the paper’s abstract [pdf]:
We use archived Spitzer [Space Telescope] data of [the star] HD189733 … encompassing six transits, eight secondary eclipses, and a phase curve in a two-step analysis. The first step derives the planet-star system parameters. The second step investigates the structure found in eclipse scanning, using the previous planet-star system parameter derivation as Gaussian priors.
We find a 5-sigma deviation from the expected occultation ingress/egress shape for a uniform brightness disk, and demonstrate that this is dominated by large-scale brightness structure and not an occultation timing offset due to a non-zero eccentricity. Our analysis yields a 2D brightness temperature distribution showing a large-scale asymmetric hot spot whose finer structure is limited by the data quality and planet orbit geometry. [emphasis mine]
Ed Weiler quit NASA over Mars planetary program cuts to be announced Monday
Ed Weiler quit NASA in September because of the cuts to the Mars planetary program that the Obama administration will announce on Monday.
Weiler was NASA’s chief science administrator for most of the past thirty years.
As I have already noted, the programs that NASA shouldn’t cut are its planetary and astronomy programs. Far better to dump the Space Launch System, which eats up a lot more cash and will end up producing nothing. By doing so you would not only reduce NASA’s actual budget — thereby saving the federal government money — you could simultaneously increase the budgets of the planetary and astronomy programs.
Is the supermassive black hole at the center of the Milky Way eating asteroids?
Is the supermassive black hole at the center of the Milky Way eating asteroids?
Another superEarth has been found orbiting a star in the habitable zone.
Another superEarth has been found orbiting a star in the habitable zone.
An M-class dwarf star called GJ 667C, which is 22 light-years away from Earth, had previously been observed to have a super-Earth (called GJ 667Cb) that orbited the star in only 7.2 days, making it too close to the star, and thus too hot, to support life.
The study started with the aim of learning more about the orbit of GJ 667Cb. But the research team found a clear signal of a new planet (GJ 667Cc) with an orbital period of 28.15 days and a minimum mass of 4.5 times that of Earth.
Though the planet is much closer to its star than the Earth, the star itself is much smaller and dimmer, so overall the planet gets about the same amount of energy as the Earth.
The face in space
The hotbed of star birth, called NGC 3324, is full of hot young stars, whose ultraviolet radiation is making the gas clouds glow. The stellar wind and radiation from the newborn stars has also punched out a cavity in the surrounding gas and dust. The edge of the wall of gas and dust at the right in the photo resembles the profile of a human face, with a ridge in the center that looks like a nose.
A NASA spacecraft has directly detected atoms from outside Solar System and found that the region is depleted in oxygen.
A NASA spacecraft has directly detected atoms from outside Solar System and found that the region appears depleted in oxygen.
Five of the biggest unsolved mysteries of physics
Identifying our galaxy’s next supernova
The North Star may be wasting away
The North Star may be wasting away.
A new superconducting detector might supersede CCDs for astronomy
Good news: A new superconducting detector might supersede CCDs for large astronomical telescopes.
Ben Mazin, an astronomer at the University of California, Santa Barbara, believes that he is on the cusp of a camera breakthrough: his lab is working on a superconducting detector that could eventually replace the charge-coupled devices (CCDs) that have become de rigueur in both consumer and astronomical digital cameras. Mazin’s detectors, known as microwave kinetic inductance detectors (MKIDs), can simultaneously count photons, measure their energy and record each one’s time of arrival — something that CCDs can do only after the light is split with a prism or a grating, an extra step that adds to the loss of photons.
And you know that inevitably some variation of this technology is going to find its way into ordinary commercial products.
Catching the death of a comet
Catching the death of a comet.
The hi-tech home of a British soccer star has become a threat to radio astronomy.
Who knew? The hi-tech home of a British soccer star has become a threat to radio astronomy.
Volunteers wanted to search for exoplanets
Want to find your very own exoplanet? Volunteers wanted!