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

According to The Astronomer's Telegram, one of the newly-discovered stars, S4711, orbits the Milky Way's black hole once every 7.6 years, claiming the record for the shortest orbital period.

Feeding frenzy: artist’s illustration of a cataclysmic variable with a white dwarf (right) feeding upon a Sun-like donor star. (Courtesy: M Weiss/Center for Astrophysics/Harvard & Smithsonian) ...

At that point, the couple's orbital period will settle into a groove of roughly 30 minutes, giving the binary pair some much-needed space in their final years together before the larger star burns ...

8000 kilometers per second: Star with the shortest orbital period around black hole discovered Date: July 5, 2022 Source: University of Cologne Summary: A newly discovered star only takes four ...

Orbital mechanics can be a bit counter-intuitive. We have to slow down an orbiting space craft to convert kinetic energy for gravitational energy. The orbital altitude is raised at its highest point ...

Saturn’s 210-kilometer-wide moon Phoebe has a brisk, 9.3-hour rotation period, much shorter than its orbit. It is believed to be an escapee from the Kuiper Belt that was then captured by Saturn.