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NASA’s 40-year-old Voyager-1 spacecraft amazes all with ground-breaking new cosmic ray data from interstellar space.

Physicists Pinpoint The Origin Of A Powerful Neutrino For The First Time Ghostly particles called neutrinos can travel nearly unimpeded across the universe. For the first time, physicists have been able to pinpoint the origin of a powerful neutrino.

How large is a neutron star? Previous estimates varied from eight to 16 kilometres. Astrophysicists at the Goethe University Frankfurt and the FIAS have now succeeded in determining the size of neutron stars to within 1.5 kilometres by using an elaborate statistical approach supported by data from the measurement of gravitational waves. The researchers’ report appears in the current issue of Physical Review Letters.

Neutron stars are the densest objects in the universe, with a mass larger than that of our sun compacted into a relatively small sphere whose diameter is comparable to that of the city of Frankfurt. This is actually just a rough estimate, however. For more than 40 years, the determination of the size of neutron stars has been a holy grail in nuclear physics whose solution would provide important information on the fundamental behaviour of matter at nuclear densities.

The data from the detection of gravitational waves from merging neutron stars (GW170817) make an important contribution toward solving this puzzle. At the end of 2017, Professor Luciano Rezzolla, Institute for Theoretical Physics at the Goethe University Frankfurt and FIAS, together with his students Elias Most and Lukas Weih already exploited this data to answer a long-standing question about the maximum mass that neutron stars can support before collapsing to a black hole—a result that was also confirmed by various other groups around the world. Following this first important result, the same team, with the help of Professor Juergen Schaffner-Bielich, has worked to set tighter constraints on the size of neutron stars.

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Ever wonder about the science behind a black hole?

If you think we have problems now, just wait a few billion years, when the accelerating expansion of the Universe triggers an energy crisis of cosmological proportions. Sounds grim, but as a new paper points out, an advanced civilization faced with doom won’t have to go gently into that good night—there may very well be a way to rage against the dying of the light.

Owing to the inexorable influence of dark energy, the space in our Universe is expanding at an accelerating rate. We don’t need to worry about this right now, but for those civilizations still around tens of billions of years from now, it’ll probably be a major headache. By this stage, galaxies outside of our Local Group—a conglomeration of about 54 nearby galaxies—will be moving away from us faster than their light can reach us, making them completely inobservable, and by consequence, utterly inaccessible.

Some scientists say we live in a multiverse, and that the universe we inhabit is just one of many — or perhaps an infinite number — in existence.

There’s a halo of dark matter permeating every galaxy, and that means its particles pass through us, too.

Our Solar System is a pretty calm place these days, all things considered, but that wasn’t always the case. In the period when the planets were still forming, collisions between various large bodies were common, and they ultimately helped shape the system that we see today. New research shows that Uranus, a chilly, hostile planet with a number of peculiar features, was the victim of a devastating impact during those early years, and it might explain some of the planet’s strange personality.

Uranus moves much differently than the other planets in our Solar System, spinning on its side in comparison to the rest of the worlds in our neighborhood. Astronomers have often wondered just how this happened, but simulations performed by scientists at Durham University’s Institute for Computational Cosmology might have finally produced the answer.

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The flash was about ten times brighter than a normal supernova.

Two telescopes that are part of the ATLAS project in Hawaii have discovered an unnaturally bright explosion in the sky.

The discovery, made in mid-June, was published in Astronomer’s Telegram, where the object was assigned the name AT2018cow or “The Cow” for short.

Continue reading “This mysterious space object is baffling astronomers all over the world” »