The Leonids’ radiant is the constellation Leo, which rises around midnight local time and is highest in the sky around dawn. The Geminids (December) The Geminids are active from about December 4 to December 17, peaking overnight from December 13 to December 14. They have a sharp peak, so the …
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Satellite observations had shown alternating stripes of light-colored and dark-colored rock in this area. In late March, Perseverance excavated one of the light-colored formations and collected a sample. In the process it discovered the strange rock—which has been named “St. Paul’s Bay.” A photo of the St. Paul’s Bay rock, …
Read More »The original version of this story appeared in Quanta Magazine. At the beginning of time and the center of every black hole lies a point of infinite density called a singularity. To explore these enigmas, we take what we know about space, time, gravity, and quantum mechanics and apply it …
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