Wide binary stars with separation greater than about 2000 astronomical units are interesting natural laboratories that allow a direct probe of gravity at low acceleration weaker than about 1 nanometer per second squared. Astrophysicist Kyu-Hyun Chae at Sejong University (Seoul, South Korea) has developed a new method of measuring gravity with all three components of the velocities (3D velocities) of stars, as a major improvement over existing statistical methods relying on sky-projected 2D velocities.
3D velocity analysis of wide binaries supports modified gravity at low acceleration
-
Harvard University is suing the Trump administration over its unprecedented attempt to bar international students from its campus. The latest salvo is that the administration has said it is canceling all federal funds, totaling US$100 [...]
-
The surprisingly announced 90-day tariff pause in the trade war between the US and China could destabilize global maritime trade more than the tariff increases imposed so far.This post was originally published on this site
-
When formulating climate policy, too little attention is paid to social factors and too much to technological breakthroughs and economic reasons. Because citizens are hardly heard in this process, European governments risk losing public support [...]
-
This month, a woman bravely testified in court she was subjected to a “degrading and humiliating experience akin to sexual assault” at the hands of New South Wales Police. The young woman was forced to [...]
-
A federal judge in Boston on May 23, 2025, temporarily blocked a Trump administration order that would have revoked Harvard University’s authorization to enroll international students.This post was originally published on this site
-
Data is the lifeblood of artificial intelligence (AI) and, as such, is a hugely valuable resource. Entrepreneur Matt Clifford’s report on the AI Opportunities Action Plan, commissioned by the UK government, has set out some [...]
-
The Government needs to take urgent steps to reverse the deterioration of England’s High Streets—particularly in the North, and in more deprived and coastal areas.This post was originally published on this site
-
Since 2008, the U.S. has spent over US$3 billion to help stabilize Mexico and stem its surge in extreme violence. The U.S. gun industry and interest group lobbyists have undercut these efforts by advocating for [...]
-
The final report of the Independent Sentencing Review has proposed the most significant reform of sentencing and punishment in England and Wales since the 1990s.This post was originally published on this site
-
Most anti-human trafficking efforts focus on breaking up sex sales. However, new research in the journal Manufacturing & Service Operations Management is turning its attention to where trafficking truly begins—recruitment.This post was originally published on [...]
