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Our galaxy is made up of some four hundred billion stars and at least a hundred billion planets. How many are like Earth, with an atmosphere, flowing water, complex geology, and abundant life? Astronomers are seeking answers in countless photons racing past the Earth and in bold new theories about how planets form and evolve. What they are finding has only sharpened one of the oldest debates in science: Is biology a powerful and inevitable byproduct of cosmic evolution? Or is it rare, in a galaxy shaped by violence and mayhem?
Is Pluto a planet? Astronomers agreed in 2006 to rename it a “dwarf planet.” But planetary scientists...
Are we alone in the Universe? Many people wonder if we’ll ever encounter an intelligence from beyond our...
Though ancient Greek philosophers like Aristotle and Epicurus are far removed from the present day, let’s...
For Earth to foster life required many processes to happen in the right order and time. Had Earth formed...
How did the Solar System form, and how did Earth...
Humans appear to be on the verge of setting out in large numbers into space on commercial flights. Space...
No less a thinker than the late Stephen Hawking sought to warn us that our time is running out on planet...
Who owns the Moon? Technically no one – but several private companies and individuals have had other ideas....
Are we in the midst of a new “Space Race”? It certainly seems so from all the international activity in...
As we look ahead to NASA’s return to the Moon,...
Asteroids loom large in our imagination: An encounter with one could wipe out all life. They hold clues to the origins of our Solar System, yet space speculators seek to exploit the resources asteroids contain. And could one host life?
A Caltech team is on the hunt for hidden planets. Building on research first published in 2016, they amassed...
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