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

One complete orbit takes Sedna about 11,400 years. Trujillo and Sheppard noticed that both Sedna and this new body had elliptical orbits that took them away from the Sun in roughly the same direction, ...

Astronomers are preparing to study a dwarf planet that last came near Earth 11,000 years ago. Sedna is moving closer to the Sun, and this has intrigued experts who are eager to learn about the distant ...

Object 90377 Sedna — a distant trans-Neptunian object known best for its highly elliptical, 11,390-year-long orbit — is currently on its way towards perihelion (its closest approach to the Sun) in ...

Who is the history’s greatest explorer? Marco Polo, Magellan, da Gamma and Cook are the main contenders, along—of course—with Christopher Columbus, whose star has fallen over the last few decades.