The new minor planet loops even further out than previously discovered dwarf planets such as Sedna and 2013 VP113. The long axis of its orbital ellipse is 730 astronomical units.

Planet Nine, if it exists, would have to be a little over six times Earth’s mass, with an orbital period of about 7,400 years. The newly cataloged minor planet is big, but not Planet Nine big.

Reported in The Astrophysical Journal Supplement Series, researchers using data from the Dark Energy Survey (DES) have identified more than 300 so-called trans-Neptunian objects (TNOs)—minor ...

The dwarf planet, called 2014 UZ224, measures about 330 miles (530 kilometers) across and is located about 8.5 billion miles (13.7 billion km) from the sun, NPR reported today (Oct. 11).

Today on the show, the story of the modern consumer movement in the U.S. and the person who inspired it: Ralph Nader. How Ralph Nader's battle in the 1960s set the stage for decades of regulation ...

But even if it doesn't spot Planet 9 directly, the Rubin Observatory might find some more minor planets, ones whose orbits might be affected by Planet 9. And that could provide additional evidence ...

The scientists announced in a news release that they have found a trans-Neptune Object(TNO), code-named 2017OF201, located past the icy and desolate region of the Kuplier Belt.

Planets originate from protoplanetary disks, circulating disks of gas and dust that develop around young stars, ... Various forces, including magnetism, influence the movement of the dust grains.

Oct. 6—Dan Fleisch, professor emeritus of physics at Wittenberg University, has spent decades looking into the sky, but now he has something out there named after him. A minor planet, also known ...

The minor planet Chiron has become a fixture in modern-day astrology. Often known as astrology’s “wounded healer,” Chiron represents our deepest wounds and our ability to turn that pain into ...

The object, named 2017 OF201, is a minor planet — one of the largest found in nearly a decade. At an estimated 700 kilometers wide, it’s likely large enough to qualify as a dwarf planet.Its ...

You may wonder why this planet-wide conversation about the future is not bigger news. The problem is that it is good news, which, as everybody knows, does not sell newspapers or drive clicks.