Space

Study finds flaw in emergent gravity | Lisa Zyga

Illustration of a three-dimensional hypersurface. Credit: Wang and Braunstein. Published in Nature Communications Aug. 10, 2018 (Phys.org) -- A new paper undermines a key assumption of the theory of emergent gravity. In recent years, some physicists have been investigating the possibility that gravity is not actually a fundamental force, but rather an emergent phenomenon that arises from the coll ...

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NASA prepares to launch Parker Solar Probe, a mission to touch the Sun | Sarah Frazier

Parker Solar Probe will explore the corona, a region of the Sun only seen from Earth when the Moon blocks out the Sun's bright face during total solar eclipses. The corona holds the answers to many o ...

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Did a rogue star change the makeup of our solar system? | Bob Yirka

Effect of a prograde, parabolic fly-by of a star with a) M=0.5 M, b) M2= 1, Mand c) M2= 5 M that is inclined by 60 degrees and has an angle of periastron equal zero. The perihelion distance is alwa ...

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Speculative wormhole echoes could revolutionize astrophysics | Pablo Bueno and Pablo A. Cano

Instant of a simulation in which two black holes merge. The collision of two rotating wormholes would trigger a similar deformation of space-time, leaving 'echoes' in the signal. Credit: LIGO LabCalt ...

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How a particle may stand still in rotating spacetime | Lisa Zyga

When a particle with a certain angular momentum is located at the critical distance rst, it remains at rest while the spacetime is rotating around it. The closer a particle is to this critical distan ...

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Earth's orbital changes have influenced climate, life forms for at least 215 million years | Dennis V. Kent

Within ancient rocks in Arizona's Petrified Forest National Park, scientists have identified signs of a regular variation in Earth's orbit that influences climate. Here, one of the authors near the r ...

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Kepler spacecraft nearing the end as fuel runs low | Charlie Sobeck

Credit: NASA March 14, 2018 (Phys.org) -- Trailing Earth's orbit at 94 million miles away, the Kepler space telescope has survived many potential knock-outs during its nine years in flight, from mech ...

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Scientists use NASA data to study link between solar storms and animal beachings | Lina Tran

Illustration of an Atlantic White-sided Dolphin and a Long-finned Pilot Whale, two marine mammal species that strand in Cape Cod. Credit: NASA GSFC/CIL/Brian Monroe Dec. 8, 2017 (Phys.org) -- The age ...

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Physicist explores the possibility of vestiges of a universe previous to the Big Bang | Peter Moon

Physicist publishes paper in General Relativity and Gravitation proposing to eliminate need for cosmological spacetime singularity and arguing that the current expansion phase was preceded by contrac ...

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Aliens may be more like us than we think | Sam Levin

Picture an alien. These illustrations represent different levels of adaptive complexity we might imagine when thinking about aliens. (a) A simple replicating molecule, with no apparent design. This m ...

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Astronomers capture first visiting object from outside our solar system | Alan Fitzsimmons

Credit: Queen's University Belfast Oct. 27, 2017 (Phys.org) -- A Queen's University Belfast scientist is leading an international team in studying a new visitor to our solar system -- the first known ...

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Study finds flaw in emergent gravity | Lisa Zyga

NASA prepares to launch Parker Solar Probe, a mission to touch the Sun | Sarah Frazier

Did a rogue star change the makeup of our solar system? | Bob Yirka

Speculative wormhole echoes could revolutionize astrophysics | Pablo Bueno and Pablo A. Cano

How a particle may stand still in rotating spacetime | Lisa Zyga

Earth's orbital changes have influenced climate, life forms for at least 215 million years | Dennis V. Kent

Kepler spacecraft nearing the end as fuel runs low | Charlie Sobeck

Scientists use NASA data to study link between solar storms and animal beachings | Lina Tran

Physicist explores the possibility of vestiges of a universe previous to the Big Bang | Peter Moon

Aliens may be more like us than we think | Sam Levin

Astronomers capture first visiting object from outside our solar system | Alan Fitzsimmons

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