Others took notice and named his theory "big bang." LeMaitre's ideas opened more questions, many of which forced physics and astronomy together: What was that primordial atom like? Why would it ...

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A new telescope could launch as early as late February. SPHEREx will look into deep space and also search for organic ...

If extraterrestrials were visiting Earth, it would be the biggest news event since the Big Bang. So the seemingly ... Wednesday, 9 p.m., PBS Mr. Anderson is the Journal’s TV critic.