Big Sky Country – A Montana night sky time lapse
An evening pause: In Glacier National Park in August 2011. From Mark “Indy” Kochte.
Tag: astronomy
Comets Elenin & Garradd Now Showing in Night Sky
Get out those binoculars! Two comets, Elenin and Garradd, are now showing in the night sky.
The closest supernovae in almost 25 years
Astronomers have spotted the closest supernovae in almost 25 years, only 21 million light years away.
The supernova, dubbed PTF 11kly, occurred in the Pinwheel Galaxy, located in the “Big Dipper,” otherwise known as the Ursa Major constellation. It was discovered by the Palomar Transient Factory (PTF) survey, which is designed to observe and uncover astronomical events as they happen. “We caught this supernova very soon after explosion. PTF 11kly is getting brighter by the minute. It’s already 20 times brighter than it was yesterday,” said Peter Nugent, the senior scientist at Berkeley Lab who first spotted the supernova. Nugent is also an adjunct professor of astronomy at UC Berkeley. “Observing PTF 11kly unfold should be a wild ride. It is an instant cosmic classic.”
Astronomers expect the supernova to continue to brighten over the next two weeks, when it should be visible to anyone using binoculars.
Asteroid dust from Hayabusa prove origin of the most common meteorites
Asteroid dust from Hayabusa have been linked to the origin of the most common meteorite types found on Earth.
When dust, pebbles, rocks, and boulders act like liquid
The science team of Lunar Reconnaissance Orbiter released an intriguing picture yesterday of what scientists call a granular flow down the side of a five mile wide crater on the far side of the moon. Looking at the image, one would swear that the darker material flowing down the slope of the crater rim is a lava flow frozen in place.
However, according to the scientists, that is not what it is. Instead, this is merely debris left behind from an avalanche.
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Astronomers discover planet made of diamond
Astronomers have discovered a planet literally made of diamond.
The new planet is far denser than any other known so far and consists largely of carbon. Because it is so dense, scientists calculate the carbon must be crystalline, so a large part of this strange world will effectively be diamond.
Stars as cold as the human body
Watching a black hole devour a star, 3.9 billion light years away
Watching a black hole devour a star, 3.9 billion light years away.
Super-Earth spotted on the edge of habitable zone
A super-Earth has been identified orbiting its star on the edge of the habitable zone.
NASA pushes for funds to save the James Webb Space Telescope
NASA pushes for funds to save the James Webb Space Telescope.
The American Eclipse of 2017
Time to start making your vacation plans. On August 21, 2017 a total eclipse of the sun is going to traverse the entire length of the continental United States, from Oregon to South Carolina. Kentucky will have the longest view, with totality as long as three minutes.
And astronomers are already thinking of ways to harness the help of the American people in observing this event. In a paper published today on the Los Alamos astro-ph website, a team of astronomers are proposing organizing something they have dubbed the U.S. Eclipse MegaMovie, whereby they gather together as many images of the totality as possible and assemble them into a single film, showing the evolution of the sun’s corona as it crosses the continent.
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A map of the core region of the Milky Way
The mystery of Vesta’s south pole depression
The mystery of Vesta’s south pole depression.
Hubble captures a necklace in space
Who needs aliens and imagined cities on the moon when you have a reality that produces such strange and beautiful things as the image on the right?
On July 2, the Hubble Space Telescope took this image of a planetary nebula, aptly dubbed the Necklace Nebula. As the caption explains,
A pair of stars orbiting close together produced the nebula, also called PN G054.2-03.4. About 10,000 years ago one of the aging stars ballooned to the point where it engulfed its companion star. The smaller star continued orbiting inside its larger companion, increasing the giant’s rotation rate.
The bloated companion star spun so fast that a large part of its gaseous envelope expanded into space. Due to centrifugal force, most of the gas escaped along the star’s equator, producing a ring. The embedded bright knots are dense gas clumps in the ring.
The binary still exists, and can be seen as the star in the center of the necklace. The two stars are now only a few million miles apart and complete an orbit around each other in about a day.
Oxygen molecules detected in star-forming region
Oxygen molecules have been detected for the first time in space, and they were found in the Orion nebula, a giant molecular cloud where stars are being born. More here.
Astronomers identify Earth’s first Trojan asteroid
Astronomers have spotted the first Trojan asteroid to the Earth.
The asteroid is roughly 1,000 feet (300 meters) in diameter. It has an unusual orbit that traces a complex motion near a stable point in the plane of Earth’s orbit, although the asteroid also moves above and below the plane. The object is about 50 million miles (80 million kilometers) from Earth. The asteroid’s orbit is well-defined and for at least the next 100 years, it will not come closer to Earth than 15 million miles (24 million kilometers).
Enceladus rains water onto Saturn
The Herschel space telescope has discovered that the water expelled from the tiger stripes on Enceladus eventually rains down on Saturn.
Enceladus expels around 250 kg of water vapour every second, through a collection of jets from the south polar region known as the Tiger Stripes because of their distinctive surface markings. These crucial observations reveal that the water creates a doughnut-shaped torus of vapour surrounding the ringed planet. The total width of the torus is more than 10 times the radius of Saturn, yet it is only about one Saturn radius thick. Enceladus orbits the planet at a distance of about four Saturn radii, replenishing the torus with its jets of water.
The Russian orbiting radio telescope has unfurled its 10 meter dish
The Russian orbiting radio telescope Spektr-R has successfully unfurled its 10 meter dish.
A massive meteorite found in China
In color from Mercury
The Messenger spacecraft has now been in orbit around Mercury since the end of March, almost four months. During that time the probe has sent back many fascinating images, showcasing a hot, alien planet whose surface was formed by impacts, volcanic activity, and some processes that no one as yet understands.
Most of the released images, however, have been in black and white, which at first glance makes one think that Mercury is not unlike the Moon. This week the Messenger team released a color image, demonstrated clearly how false this assumption is. The image below shows two very different craters, a dark-haloed crater named Basho at the bottom left of the image, and a very bright crater, Kalidasa crater, near the top left. On the right of the image is a dark haloed Tolstoj basin. For an uncropped full resolution version go here.
