The orbit of Ammonite (red line) and the orbits of the other three sednoids (white lines). Ammonite was discovered close to its perihelion, at a distance of 71 astronomical units (71 times the average ...

Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the ...

Georges River families, schools and science enthusiasts to take part in Solar Explorer, a large-scale, self-guided activity ...

Ever since the International Astronomical Union recognized Haumea and Makemake as dwarf planets in 2008, University of Maine ...

From there, planets have been placed at accurately scaled distances across Georges River, giving participants a real sense of just how vast the solar system is. Each stop includes signage, clues and ...

At these distances, the satellites remain within Earth’s protective magnetic shield and can reliably measure the planet’s ...

Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

A total solar eclipse will not occur on August 2, 2025, despite viral claims. The real event is on August 2, 2027, featuring ...

The solar system’s most distant planet sits 1.1° due north of Saturn, placing them together in a single telescopic field of view all night.

Your experience of time is relative because it depends on motion – more specifically, your speed and acceleration.