Dark matter or cooling “primordial soup” could create gravitational waves

In January scientists reported the detection of very low-frequency gravitational waves. Now astrophysicists have investigated two possible sources – the universe cooling down after the Big Bang, and a field of particles that could be dark matter.

Source of Article

Continue Reading Dark matter or cooling “primordial soup” could create gravitational waves

New theoretical warp drive design clears “negative energy” barrier

Faster-than-light “warp drives” may be theoretically possible, but they usually involve exotic physics well out of our reach. Now an astrophysicist has outlined a hypothetical design that could allow FTL travel using conventional physics.

Source of Article

Continue Reading New theoretical warp drive design clears “negative energy” barrier

Unexplained X-ray signals from neutron stars hint at “ghost” particles

Astronomers have detected a strange signal coming from neutron stars that could be a new elementary particle. An unexplained excess of X-rays hints at axions, hypothetical “ghost” particles that could solve several long-standing physics puzzles.

Source of Article

Continue Reading Unexplained X-ray signals from neutron stars hint at “ghost” particles

Astronomers may have detected background ripples in spacetime itself

The gravitational waves we’ve detected so far have been like tsunamis in the spacetime sea. Now, a 13-year survey of light from pulsars scattered across the galaxy may have revealed the first hints of gentle gravitational wave background signals.

Source of Article

Continue Reading Astronomers may have detected background ripples in spacetime itself

Neutron stars scanned for signals of dark matter turning into light

Dark matter should outnumber regular matter five to one, yet it remains frustratingly elusive. But there might be ways to spot it, and now astronomers have scanned neutron stars for telltale signals of a proposed dark matter particle called an axion.

Source of Article

Continue Reading Neutron stars scanned for signals of dark matter turning into light

Graphene tractor beams could one day redirect lightning strikes

Lightning is a major trigger for wildfires, like the record-breaking blazes that devastated Australia and California this year. But what if we could redirect lightning to strike safely? Graphene particles trapped in a tractor beam could do just that.

Source of Article

Continue Reading Graphene tractor beams could one day redirect lightning strikes

CERN scientists design trap to transport antimatter between facilities

Antimatter is a tricky substance to store and transport, mostly because it annihilates any container you try to put it in. Now CERN researchers have outlined a new antimatter trap designed to safely carry the volatile stuff to new facilities.

Source of Article

Continue Reading CERN scientists design trap to transport antimatter between facilities

Scientists calculate how much matter there is in the universe

Scientists have estimated the total amount of matter in the universe using a more precise method. By calculating the mass of hundreds of galaxy clusters, the team found that matter makes up around a third of the contents of the universe.

Source of Article

Continue Reading Scientists calculate how much matter there is in the universe

Gravitational waves signal most massive black hole collision ever recorded

The LIGO and Virgo Scientific Collaboration has detected gravitational waves coming from the most massive black hole collision that it's ever recorded. The end result created a gargantuan black hole that belongs to a new class.

Source of Article

Continue Reading Gravitational waves signal most massive black hole collision ever recorded

Gravitational waves signal most massive black hole collision ever recorded

The LIGO and Virgo Scientific Collaboration has detected gravitational waves coming from the most massive black hole collision that it's ever recorded. The end result created a gargantuan black hole that belongs to a new class.

Source of Article

Continue Reading Gravitational waves signal most massive black hole collision ever recorded