Welcome toAtheist Universe
Sign Upor Sign In
Or sign in with:
Imagine No Religion
We are a worldwide social network of freethinkers, atheists, agnostics and secular humanists.
Give a Gift
Give a Gift
Give a Gift
Give a Gift
Give a Gift
Kimberly Trader Vozel
Give a Gift
Give a Gift
Give a Gift
Cosmology Astrophysics Astronomy
Latest Activity: on Tuesday
Cosmology - Astrophysics - Astronomy
Hubble Wallpaper - Awesome Hubble Images
Started by May the Big Bang RIP. Last reply by May the Big Bang RIP Jul 23, 2017.
Started by Mrs.B. Last reply by Mrs.B Apr 9, 2016.
Started by Davy. Last reply by Onyango Makagutu Mar 8, 2016.
Started by Davy Oct 3, 2013.
Started by Davy. Last reply by Davy Aug 15, 2013.
The Last Goodbye
Ask Ethan: Why Did Light Arrive 1.7 Seconds After Gravitational Waves In The Neutron Star Merger?
Five Discoveries In Fundamental Physics That Came As Total Surprises
Even while the world suffers, investing in science is non-negotiable (Synopsis)
Merging Neutron Stars Deliver Deathblow To Dark Matter And Dark Energy Alternatives (Synopsis)
That crater is really a bright blue!
The water is warm, but they still deny climate change!
OMG, the Water's Warm! NASA Study Solves Glacier Puzzle
A new NASA study explains why the Tracy and Heilprin glaciers, which flow side by side into Inglefield Gulf in northwest Greenland, are melting at radically different rates.
Using ocean data from NASA's Oceans Melting Greenland (OMG) campaign, the study documents a plume of warm water flowing up Tracy's underwater face, and a much colder plume in front of Heilprin. Scientists have assumed plumes like these exist for glaciers all around Greenland, but this is the first time their effects have been measured.
The finding highlights the critical role of oceans in glacial ice loss and their importance for understanding future sea level rise. A paper on the research was published June 21 in the journal Oceanography.
Tracy and Heilprin were first observed by explorers in 1892 and have been measured sporadically ever since. Even though the adjoining glaciers experience the same weather and ocean conditions, Heilprin has retreated upstream less than 2.5 miles (4 kilometers) in 125 years, while Tracy has retreated more than 9.5 miles (15 kilometers). That means Tracy is losing ice almost four times faster than its next-door neighbor.
This is the kind of puzzle OMG was designed to explain. The five-year campaign is quantifying ice loss from all glaciers that drain the Greenland Ice Sheet with an airborne survey of ocean and ice conditions around the entire coastline, collecting data through 2020. OMG is making additional boat-based measurements in areas where the seafloor topography and depths are inadequately known.
‘Once in a blue dune’: NASA shares striking image of Martian crater
NASA has shared a stunning image of a field of finely-marked turquoise sand dunes smeared across the floor of a Martian crater. The eye-catching snap, captured by the Mars Reconnaissance Orbiter, shows an accumulation of ‘barchan’ (or crescent-shaped) sand dunes on the Lyot Crater –a large crater in the Vastitas Borealis region of the Red Planet.Just to the south of the group of barchan dunes lies a large dune with a stranger and more complex structure, depicted in a striking blue shade in the enhanced color image. According to NASA, this formation is made of finer material and may have “a different composition than the surrounding” dunes.The blue patch appears marked and dimpled in more refined ridges than the wider area nearby.
Mars is currently under the grip of a massive dust storm that has turned the landscape blood red. The colossal storm has now encircled the entire planet.
Earlier this month, NASA’s Opportunity rover was knocked offline due to lack of solar power as a result of the massive storm. The Curiosity Rover is still functioning on the opposite side of the planet but is facing deteriorating visibility.
Charon at 40: Four Decades of Discovery on Pluto’s Largest Moon
The largest of Pluto's five moons, Charon, was discovered 40 years ago today by James Christy and Robert Harrington at the U.S. Naval Observatory in Flagstaff, Arizona – only about six miles from where Pluto itself was discovered at Lowell Observatory. They weren't even looking for satellites of Pluto – Christy was trying to refine Pluto's orbit around the Sun.
Read more=. https://www.nasa.gov/feature/charon-at-40-four-decades-of-discovery...
Doone smashing pictures of the future cities.
We in the UK had a TV programme called Tomorrows World where they would try and predict the landscape and technology of the near and far future. As you would expect they were dead hot on the near future predictions. According to their predictions, we should all be flying our own Helicopters by now. One of the more exciting predictions was that we should have had a lunar base by now. When you think about it we have definitely slowed down with the space programs.
Good note, Stephen. The Universe is an amazing place! We are lucky to be living the best universe!
Hubble proves Einstein correct on galactic scales (heic1812)21 June 2018An international team of astronomers using the NASA/ESA Hubble Space Telescope and the European Southern Observatory's Very Large Telescope has made the most precise test of general relativity yet outside our Milky Way. The nearby galaxy ESO 325-G004 acts as a strong gravitational lens, distorting light from a distant galaxy behind it to create an Einstein ring around its centre. By comparing the mass of ESO 325-G004 with the curvature of space around it, the astronomers found that gravity on these astronomical length-scales behaves as predicted by general relativity. This rules out some alternative theories of gravity.
Using the NASA/ESA Hubble Space Telescope and European Southern Observatory's Very Large Telescope (VLT), a team led by Thomas Collett (University of Portsmouth, UK), was able to perform the most precise test of general relativity outside the Milky Way to date.The theory of general relativity predicts that objects deform spacetime, causing any light that passes by to be deflected and resulting in a phenomenon known as gravitational lensing. This effect is only noticeable for very massive objects. A few hundred strong gravitational lenses are known, but most are too distant to precisely measure their mass. However, the elliptical galaxy ESO 325-G004 is amongst the closest lenses at just 450 million light-years from Earth.Using the MUSE instrument on the VLT the team calculated the mass of ESO 325-G004 by measuring the movement of stars within it. Using Hubble the scientists were able to observe an Einstein ring resulting from light from a distant galaxy being distorted by the intervening ESO 325-G004. Studying the ring allowed the astronomers to measure how light, and therefore spacetime, is being distorted by the huge mass of ESO 325-G004.Collett comments: "We know the mass of the foreground galaxy from MUSE and we measured the amount of gravitational lensing we see from Hubble. We then compared these two ways to measure the strength of gravity – and the result was just what general relativity predicts, with an uncertainty of only nine percent. This is the most precise test of general relativity outside the Milky Way to date. And this using just one galaxy!"General relativity has been tested with exquisite accuracy on Solar System scales, and the motions of stars around the black hole at the centre of the Milky Way are under detailed study, but previously there had been no precise tests on larger astronomical scales. Testing the long range properties of gravity is vital to validate our current cosmological model.These findings may have important implications for models of gravity alternative to general relativity. These alternative theories predict that the effects of gravity on the curvature of spacetime are "scale dependent". This means that gravity should behave differently across astronomical length-scales from the way it behaves on the smaller scales of the Solar System. Collett and his team found that this is unlikely to be true unless these differences only occur on length scales larger than 6000 light-years."The Universe is an amazing place providing such lenses which we can use as our laboratories," adds team member Bob Nichol (University of Portsmouth). "It is so satisfying to use the best telescopes in the world to challenge Einstein, only to find out how right he was."
Where did our nice imaginary future go?
Fantastic futures, illustrated by Frank R. Paul, Eberhard Binder, Syd Mead, and Shusei Nagaoka.
Why the emotionalism?
Geocentrists wanted the earth to be the center of the universe, and medieval churchmen hated its demise.
The Big Bang is anthropocentrism’s last hurrah.
Humankind is an accident, and some humans REALLY HATE THAT. If they could get away with burning people at stakes, they would do it to electric universe folk.
The 4th Flavor? Scientists Close in on a New Kind of Neutrino https://goo.gl/wDmZcT
© 2018 Created by Atheist Universe.
Report an Issue |
Terms of Service
Please check your browser settings or contact your system administrator.