An invisible force has been pulling apart one side of the nearby Hyades star cluster, leaving the tail of the stellar group partially devoid of stars. The astronomers who noticed the phenomenon suspect that a dark matter structure with the mass of 10 million suns is behind the mysteriousread more
It would appear that Stonehenge was built about 400 years earlier than originally estimated—albeit on a site in western Wales, 225 kilometers (140 miles) from Wiltshire, England, where the iconic megalithic formation stands today. When Stonehenge was first erected sometime around 2,900 BCE it looked vastly different from the familiarread more
[Updated Feb. 19 to reflect Perseverance and Ingenuity’s successful landing] Mars became a fair bit busier this month, with no less than three missions—each from a different country—having arrived at the red planet over the past few weeks. The UAE’s Al-Amal and China’s Tianwen-1 spacecraft entered orbit earlier in February, and NASA’s Mars 2020read more
Although the first known interstellar object to pass through our Solar System has long since passed beyond our reach, the Harvard astrophysicist that first proposed that ʻOumuamua might have been an artificial object built by an extraterrestrial civilization has expanded on the concept. In an interview with Salon magazine about his newread more