If humans want to live on Mars, we’re going to need to grow food. How well can seeds survive harsh, non-Earth conditions?
The Expose-R experiment was equipped with three trays containing a variety of biological samples – including seeds. Image via NASA.
Will the September 23, 2017 sky mirror “signs” from the Bible’s Book of Revelation? Possibly. But this same sky scene has been seen 4 other times in the past 1,000 years. An astronomer explains.
Comets are loose collections of ice and dust, sometimes with long tails. Asteroids are more rocky or metallic. Now astronomers have found a comet-like double asteroid.
How to see the star Fomalhaut in your sky and a word about Fomalhaut b, the first planet beyond our solar system visible to the eye in photographic images.
This image shows the debris ring around Fomalhaut and the location of its first known planet. This is the actual discovery image, published in the journal Science in November, 2008. Fomalhaut b was the first beyond our solar system visible to the eye in photographic images. Image via Hubble Space Telescope.
2017’s September equinox arrives today. Happy autumn (or spring)!
Another great explanation of Friday’s equinox – plus beautiful graphics – from astronomer Guy Ottewell.
Our scene, for an hour after sunset on equinox day in mid-U.S.A., happens to be about three hours after the instant of the equinox. You can see that the “anti-Sun,” as we can call the point 180 degrees from the Sun, appears to be just on the opposite crossroads of ecliptic and equator. Image via Guy Ottewell.
OSIRIS-REx – bound for a 2018 encounter with asteroid Bennu – will sweep in close to Earth on Friday. It’ll be closest today just before 16:52 UTC (12:52 p.m. EDT).
Mike Olason in Denver, Colorado caught OSIRIS-REx with a telescope and CCD camera on September 20, 2017. He wrote: "The image is an average of 19 images (each image is 3 minutes) stacked. The sequence shows 1 hour in the life of the spacecraft. The spacecraft is moving to the west-southwest (west is down and south is left) in this image."
Wow! So many beautiful photos of something relatively hard to catch … the young moon returning to the evening sky this week next to the bright planet Jupiter.
Ashly Cullumber caught this shot on September 21 and wrote: "Crescent Moon & Jupiter setting over Avila Beach, CA -- captured from Shell Beach, CA on this last day of summer."
The scorching hot surface of Mercury – our sun’s innermost planet – seems an unlikely place to find ice. But a new study suggests otherwise.
Brown researchers have found new evidence of ice sheets in permanently shadowed craters near the north pole of Mercury. Image via Head lab / Brown University.