Jeff Swaim

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Maths and murals: Leiden’s wall formulae : A view From the Bridge

<b>Posted on behalf of Quirin Schiermeier</b><p>Albert Einstein’s field equations from his theory of general relativity combine wonderful scientific intuition …

Astronomers Have Finally Found Most of The Universe's Missing Visible Matter

Whoa.<p>In our eagerness to identity the Universe's occult phenomena of dark energy and dark matter, we often forget that most of its better defined …

A new technique to gauge the distant Universe

Scientists have developed a technique to use quasars – powerful sources driven by supermassive black holes at the centre of galaxies – to study the …

Universe

[1510.04990] Gravitational waves from isolated systems: Surprising consequences of a positive cosmological constant

Abstract: There is a deep tension between the well-developed theory of gravitational waves from isolated systems and the presence of a positive …

Possible Light Flash from Black Hole Collision Spotted

SALT LAKE CITY — When black holes collide, do they hide in the dark or emit flashes of light?<p>That question is up the air after an Earth-based …

Researchers Create The Largest Ever Simulation of the Universe

The simulation involves 25 billion galaxies and 2 trillion particles of dark matter.<p>A group of researchers have build the world's largest simulation of the universe, containing around 25 billion virtual galaxies. The simulation could help in the search for mysterious dark matter.<p>Astronomers from …

Supermassive Black Holes Suggest We May Be Very Wrong About How Our Universe Formed

Riddled with Holes<p>The universe can be thought of as one big, continuously expanding space. An interesting theory about this expansion assumes that …

Theoretical battle: dark energy vs. modified gravity

LIGO could help tell us whether gravitational waves move at the speed of light.<p>Two decades ago, scientists found that the Universe’s expansion is …

The Man Who's Trying to Kill Dark Matter

For 80 years, scientists have puzzled over the way galaxies and other cosmic structures appear to gravitate toward something they cannot see. This …

Holy moly! Image of space shows a thousand black holes

It looks like a bunch of slightly blurry, multicoloured fireflies.<p>The image may not seem impressive at first, but it certainly improves on more intimate acquaintance. It's actually a more than 1,000 black holes at the centres of galaxies, NASA's Chandra X-ray Observatory said last week when it …

Posthumous Paper Resolves Century-Old Mystery of How Stars Evolve

Chances are you’ve never heard of Allan Sandage, but the late astronomer was a major figure in 20th century astronomy, particularly known for his …

Japanese 3D Galaxy Map Confirms Einstein Was One Smart Dude

On June 30th, 1905, Albert Einstein started a revolution with the publication of theory of Special Relativity. This theory, among other things, …

Physics

The Great Photon Escape

3tags.org is coming soon

The Biggest Problem With The Expanding Universe

And why it might spell trouble for dark energy as we know it.<p>“That’s all regular matter, just five percent. A quarter is “dark matter,” which is …

2016 April 20 - Galaxy Einstein Ring

<b>Galaxy Einstein Ring</b> <b><br>Image Credit:</b> Y. Hezaveh (Stanford) et al., ALMA (NRAO/ESO/NAOJ), NASA/ESA Hubble Space Telescope<p><b>Explanation:</b> Can one galaxy hide …

The Universe Is Expanding Faster Than The Laws of Physics Can Explain, New Measurements Reveal

Time for some new physics?<p>The most precise measurement ever made of the current rate of expansion of the Universe has been achieved by physicists in …

Mysterious infrared light from space resolved perfectly

Astronomers have detected the faintest millimeter-wave source ever observed. By accumulating millimeter-waves from faint objects throughout the …

Eight Years Ago Today, Earth Was Slammed by a Huge Cosmic Blast

<i>[This post is a modified, updated version of an article I wrote a few years back. Since today is the anniversary of the event, I thought it could use</i> …

Pulsar Web Could Detect Low-Frequency Gravitational Waves

The recent detection of gravitational waves by the Laser Interferometer Gravitational-Wave Observatory (LIGO) came from two black holes, each about …

Gravitational Waves

Gravitational Waves at Last

<i>ONCE upon a time, there lived a man who was fascinated by the phenomenon of gravity. In his mind he imagined experiments in rocket ships and</i> …

It's Complicated: Revising Dark Matter's Relationship with Galaxy Groups

Galaxy clusters, containing thousands of individual galaxies, are some of the largest celestial objects in the heavens. In a new study, scientists …

Dark Matter

2016 February 12 - Two Black Holes Merge

<b>Two Black Holes Merge</b> <b><br>Simulation Credit:</b> Simulating eXtreme Spacetimes Project<p><b>Explanation:</b> Just press play to watch two black holes merge. Inspired by …

CERN Url Shortening Service

How Big Can a Galaxy Get? Big. Very, Very Big.

Nature does love spirals.<p>Phil Plait writes <b>Slate</b>’s Bad Astronomy blog and is an astronomer, public speaker, science evangelizer, and author of <i>Death</i> …

Universe

2016 February 7 - Advanced LIGO: Gravitational Wave Detectors Upgraded

<b>Advanced LIGO: Gravitational Wave Detectors Upgraded</b> <b><br>Image Credit:</b> LIGO, Caltech, MIT, NSF<p><b>Explanation:</b> Accelerate a charge and you'll get …

This photo of gas streaming from a black hole is the 'highest-resolution image ever seen in astronomy'

What do you get when you combine 15 radio telescopes on Earth and one in space? You get an enormous "virtual telescope" that is 63,000 miles across. And when you point it at a distant black hole, you get the highest resolution image every seen in astronomy.<p>Although it looks just like a big green …

Black Holes