A quiet but measurable shift in Earth’s gravity field between 2006 and 2008 has baffled scientists for years. Now, nearly two decades on, new research suggests the anomaly may have been triggered by a ...

Astronomers uncover a cosmic mystery: an extra image in an Einstein Cross points to a massive dark matter halo.

Despite keeping us grounded and warping light that travels through space, gravity is actually quite a weak force. The smaller the mass, the less gravity appears to have any pull, until at quantum ...

The Indian Ocean Geoid Low (IOGL), a significant gravitational anomaly, has puzzled scientists for decades. Research suggests ...

Something seems to be missing from the universe, and the favored model of physics calls it “dark matter” – but despite a century of searching, it remains a no-show. A new paper proposes an alternative ...

Mike Moss's weather blog post on the "plethora of optical phenomena" recently seen over Huntsville, Ala., reminded me a bit of a similar but space-based optical phenomenon. It's not crystals, which ...

Energy-momentum distribution remains a fundamental yet challenging aspect of theoretical physics. In general relativity, the localisation of gravitational energy is obscured by the equivalence ...

This new propulsion system could rewrite the rules of spaceflight—not to mention completely defy conventional physics.

Mass is mass is mass. Physicists have three different definitions of mass, all thought to be equivalent. Measurements of the distance between Earth and the moon confirm that two of those masses are ...