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“Space Exploration”

Nov 7, 2015 07:00 AM ET // Elizabeth Howell
It's hard work to be in space for months at a time. Read about the record-holders for America's single spaceflights -- including Scott Kelly, who just recently surpassed the previous mark of 215 days.
Nov 3, 2015 04:00 PM ET // Irene Klotz
After 15 years of a continuous crewed presence, here are just a few of the highs and lows of humanity's most ambitious international endeavor in space.
Oct 29, 2015 01:15 PM ET
Scientists are taking initial steps in a long-term effort to learn as much as they can about gravitational waves -- mysterious undulations in the fabric of space-time that have so far evaded clear detection.
Oct 28, 2015 12:50 PM ET
It could be that the plucky rovers we've sent to explore the Red Planet have brought with them unwelcome, hitchhiking bacteria.
Oct 27, 2015 12:40 PM ET // Elizabeth Howell
Is a lunar space port a viable stepping stone to Mars?
Oct 27, 2015 10:58 AM ET
The first astronauts on the Moon were global celebrities of their day, their missions lionized. How will the public feel about a Red Planet we can't really even see in our night sky?
Oct 23, 2015 10:10 AM ET // Irene Klotz
The chosen site, Oxia Planum, is laced with tantalizing chemical fingerprints of clays and other minerals.
Oct 16, 2015 12:55 PM ET
Although technically you can't "weigh" a star, since it will change relative to gravitation, astronomers CAN work out just how much matter is inside the bright bulbs in our sky and beyond.
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