Sedna is drifting into a part of its path where human technology can finally contemplate catching up, and that window will ...

Astronomers announced Monday they had discovered the most distant object ever detected in the solar system -- a fiercely cold object neither planet nor comet, but a mysterious fossil remnant of a time ...

In 2004, astronomers announced the discovery of a red, frigid planet-like body at the outskirts of our solar system. Michael E. Brown, the Caltech astronomer who spotted the object (and who would ...

When the distant planetoid Sedna was discovered on the outer edges of our solar system, it posed a puzzle to scientists. Sedna appeared to be spinning very slowly compared to most solar system objects ...

While new discoveries about Mars continue to make headlines, another “red planet”—known as Sedna (or 90377 Sedna)—is making its way into the inner solar system. At this moment, the crimson-hued dwarf ...

On a mission to streamline email, messaging, and data, SEDNA Systems has raised $10 million in Series A funding. Based in the United Kingdom with a presence in Vancouver, SEDNA was founded in 2017 by ...

WASHINGTON - Strange planetoid Sedna, the most distant object in the solar system, was supposed to have a companion moon, but even the Hubble Space Telescope could not find it, scientists said ...

Sedna, the Solar System's farthest known object, does not have a moon, puzzled astronomers have revealed. Its slow spin was thought to be due to the gravity of a small, companion body. Researchers ...