An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Study reveals an interstellar object's impact on planetary orbits, reshaping solar system dynamics. Discover how simulations ...

A dive into probabilities, asteroid impact modeling, and what sort of damage an approximately 180-foot asteroid could cause ...

Because the period of an object does not depend on its mass, comets’ orbital periods remain unchanged due to mass loss.

Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered […] The post ...

The majority of our evidence for dark matter’s existence comes from observing visible (or baryonic) matter that does not ...

If it’s real, some may question whether something with a mass about three times Pluto’s counts as a planet at all.

Further simulations on flybys into the inner Solar System revealed one of our own planets might be flung out of the ballpark ...

Millions of people from the poor world are trying to cross seas, forests, valleys and rivers, in search of safety, work and ...

The observational campaign, detailed ... Mass can be defined as a quantitive measure of the resistance an object has to change in its velocity. In physics, mass (from Ancient Greek: μᾶζα ...

An object we thought belonged to the most common category of planet ... It was discovered in 2009, with a mass and radius that put it somewhere between Earth and Neptune. Subsequent observations ...

After decades of study, scientists sound genuinely optimistic about the possibility of detecting primordial black holes, which might explain dark matter.