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Il y a 1 jour · As far back as 1972, Carl Sagan and George Mullen noted that because the young sun was fainter than it is today, early Mars should have been extremely cold, unless its climate was radically ...
Il y a 1 jour · Philip Anderson, Robert Laughlin, Leon Cooper and others have all written popular books, but none have performed so well as similar fare from Lisa Randall, Carl Sagan, or Steven Weinberg.
Il y a 1 jour · Oof, gut-tightening stuff. The contents of the record were selected for Nasa by a committee chaired by American astronomer Carl Sagan. Accompanying the Golden Record are instructions, mapped out ...
Il y a 2 jours · A chilly, thick atmosphere. At an average distance of 1.4 billion kilometers (886 million miles) from the Sun, Titan is a frigid world. Its average surface temperature is about -179 degrees Celsius (-290 degrees Fahrenheit). So to visit Titan, you’d need a heavily insulated space suit.
Il y a 1 jour · Scientists have identified a set of greenhouse gasses which could be used as a marker to look for advanced alien civilisations with the potential to transform entire planets to make them habitable ...
Il y a 2 jours · Carl Sagan understood this. A well-cited journal article might have 100 or 1,000 readers, but Dr. Sagan understood that a well-placed media appearance could reach millions. He also understood something that is increasingly important: Public dollars fund a large percentage of research. We should brim with pride and excitement to tell people about the returns on their investments.
Il y a 3 jours · I was reading Carl Sagan, who was one of the original five authors of the nuclear winter theory, who wrote about how after these bodies of water that get frozen over for years, after they thaw out ...
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