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The Daily Cosmos


The Daily Cosmos


Location: #science
Members: 58
Latest Activity: on Thursday


Cosmology - Astrophysics - Astronomy


Hubble Wallpaper - Awesome Hubble Images

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Comment by theRealDoone on May 21, 2017 at 7:21pm

Earth in a few billion years. So stop complaining about the Florida heat people!

Comment by Stephen on May 19, 2017 at 7:50pm

Olena Shmahalo/Quanta Magazine

Olena Shmahalo/Quanta Magazine

A Cosmic Burst Repeats, Deepen­ing a Mystery

“A minor point of interest regarding the Spitler Burst.” The email subject line popped up on Shami Chatterjee’s computer screen just after 3 in the afternoon on Nov. 5, 2015.

When Chatterjee read the email, he first gasped in shock — and then sprinted out of his Cornell University office and down the corridor to tell a colleague. Twenty-eight minutes later, when he started to draft a reply, his inbox was already buzzing. The email thread grew and grew, with 56 messages from colleagues by midnight.

For nearly a decade, Chatterjee and other astrophysicists on the thread had been trying to understand the nature of short, superenergetic flashes of radio waves in space. These “fast radio bursts,” or FRBs, last just a few milliseconds, but they are the most luminous radio signals in the universe, powered by as much energy as 500 million suns. The first one was spotted in 2007 by the astronomer Duncan Lorimer, who together with one of his students stumbled upon the signal accidentally in old telescope data; at the time, few believed it. Skeptics suspected interference from mobile phones or microwave ovens. But more and more FRBs kept showing up — 26 have been counted so far, including the Spitler burst, detected by the astronomer Laura Spitler in data from 2012 — and scientists had to agree they were real.

The question was, what causes them? Researchers sketched dozens of models, employing the gamut of astrophysical mysteries — from flare stars in our own galaxy to exploding stars, mergers of charged black holes, white holes, evaporating black holes, oscillating primordial cosmic strings, and even aliens sailing through the cosmos using extragalactic light sails. For scientists, the FRBs were as blinding as flash grenades in a dark forest; their power, brevity and unpredictability simply made it impossible to see the source of the light.

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Comment by Mrs.B on May 18, 2017 at 10:16pm


Comment by theRealDoone on May 18, 2017 at 9:01pm

Scientists think parallel universe crashing into our own created ga...

Ottawa Citizen  - ‎3 hours ago‎
A curious chilly area of space may have been created when a parallel universe crashed into our own, scientists have suggested - the first evidence that we may be part of a multiverse.
Comment by Mrs.B on May 13, 2017 at 6:35pm

AHA......I KNEW it wasn't my fault......its the galaxy's fault!!!

Comment by Stephen on May 13, 2017 at 6:31pm

HST. . Bulge Formations. .
Just as many people are surprised to find themselves packing on unexplained weight around the middle, astronomers find the evolution of bulges in the centres of spiral galaxies puzzling. A recent NASA/ESA Hubble Space Telescope image of NGC 4710 is part of a survey that astronomers have conducted to learn more about the formation of bulges, which are a substantial component of most spiral galaxies.

When targeting spiral galaxy bulges, astronomers often seek edge-on galaxies, as their bulges are more easily distinguishable from the disc. This exceptionally detailed edge-on view of NGC 4710 taken by the Advanced Camera for Surveys (ACS) aboard Hubble reveals the galaxy's bulge in the brightly coloured centre. The luminous, elongated white plane that runs through the bulge is the galaxy disc. The disc and bulge are surrounded by eerie-looking dust lanes.

When staring directly at the centre of the galaxy, one can detect a faint, ethereal "X"-shaped structure. Such a feature, which astronomers call a "boxy" or "peanut-shaped" bulge, is due to the vertical motions of the stars in the galaxy's bar and is only evident when the galaxy is seen edge-on. This curiously shaped puff is often observed in spiral galaxies with small bulges and open arms, but is less common in spirals with arms tightly wrapped around a more prominent bulge, such as NGC 4710.

NGC 4710 is a member of the giant Virgo Cluster of galaxies and lies in the northern constellation of Coma Berenices (the Hair of Queen Berenice). It is not one of the brightest members of the cluster, but can easily be seen as a dim elongated smudge on a dark night with a medium-sized amateur telescope. In the 1780s, William Herschel discovered the galaxy and noted it simply as a "faint nebula". It lies about 60 million light-years from the Earth and is an example of a lenticular or S0-type galaxy – a type that seems to have some characteristics of both spiral and elliptical galaxies.

Astronomers are scrutinising these systems to determine how many globular clusters they host. Globular clusters are thought to represent an indication of the processes that can build bulges. Two quite different processes are believed to be at play regarding the formation of bulges in spiral galaxies: either they formed rather rapidly in the early Universe, before the spiral disc and arms formed; or they built up from material accumulating from the disc during a slow and long evolution. In this case of NGC 4710, researchers have spotted very few globular clusters associated with the bulge, indicating that its assembly mainly involved relatively slow processes.

Credit : NASA and ESA


Comment by Mrs.B on May 12, 2017 at 2:21pm

Who'd have thought we'd be hearing this crap in the 2000's????!!!!!

Comment by Stephen on May 12, 2017 at 6:52am

Arab PhD Student’s Thesis Presents ‘Scientific Evidence’ That The Earth Is Flat

Recently, the Arab and Tunisian educational and scientific community was ‘rocked’ when a certain PhD student in science presented a thesis claiming that the Earth is flat, is stationary, is the center of the universe, and is only about 13,500 years of age.

As if that wasn’t enough, the student likewise rejected Newton and Einstein’s physics, Copernicus and Kepler’s astronomy, the Big Bang cosmology, and many other scientific teachings of the past.

According to the , the student submitted the said thesis “after five years of work.” Eventually, it was “sent to two assessors, thus passing the first stage of approvals” and the defense is expected to be scheduled soon.

The doctoral thesis says that the Earth is flat and young and that it remains stationary at the middle of the universe.

It likewise claims that the sub has a diameter of 1,135 km, not 1.4 million km, and that the moon has a width of 908 km – and that both of these celestial bodies like 687 and 23 times nearer to our planet.

The thesis also goes on to say that there are 11 planets and that stars have limited number.

In addition to the thesis submission, a journal paper arguing about the planet’s geo-centrism was also published.

Meanwhile, the former president of Tunisian Astronomical Association got hold of a copy and “leaked” it online.

Many has considered the claims scandalous as the thesis explicitly rejects modern science. Some, however, are disturbed by the fact that it was done by a PhD science student and her supervisor was a Professor – the “highest in academia,” Gulf News points out.

Many are hitting the thesis for its numerous grammatical errors and lackluster references.

Moreover, some have attacked the journal, labeling it as “fake and predatory,” accusing it as one of those “pay and we’ll publish your article quickly, with no reviewing or editing” type of work.

Well, what do you think about this thesis, our dear readers? Tell us about it by leaving a comment below!

Comment by Mrs.B on May 11, 2017 at 8:39pm

What a great view!

Comment by Stephen on May 11, 2017 at 8:32pm

Loki Patera on Jupiter’s innermost moon is a giant bowl of molten rock – but it doesn’t behave like one

Loki Patera on Jupiter’s innermost moon is a giant bowl of molten rock – but it doesn’t behave like one

Waves surge in opposite directions around Io’s largest lava lake

Surf’s up on Jupiter’s moon. Magma waves travelling both clockwise and anticlockwise have been spotted on the surface of a lava lake on Io, the most volcanically active body in the solar system.

The lake, called Loki Patera, is a bowl-shaped volcanic crater on Io, Jupiter’s innermost moon. It is roughly 200 kilometres across, and responsible for 10 to 20 per cent of the heat that the jovian moon puts out.

We’ve known that Loki periodically brightens and dims since the 1970s. Previous observations suggested that these changes are due to the lake recycling itself. As the top layer of lava cools, it solidifies and grows dense, until eventually it sinks beneath the underlying magma and pulls nearby crust with it in waves moving across the surface.

But most of those observations, based on a technique for reducing atmospheric blurring called adaptive optics, were only sharp enough to tell which direction the waves were moving, not how fast or where they started.

Now, Katherine de Kleer at the University of California, Berkeley and her colleagues have taken advantage of a rare collusion between Jupiter’s moons to get a high-quality time lapse of the lava lake’s surface.

Time-lapse images of the lake’s surface reveal how its surface regenerates

Every six years, the orbits of Io and Europa – a moon of Jupiter best known for its ice shell covering a liquid water ocean – align, then cross one another from the point of view of Earth.

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