Hosted by Cstar1|Galaxies & More!
We keep our star talk down to earth! Beginning stargazers, professional astronomers, armchair astronauts and the cosmologically curious are all invited to join us. Galaxies Astronomy Club was founded in 1994.
1573 messages in 259 discussions
Latest 3/17/19 by Cstar1
3564 messages in 838 discussions
177 messages in 23 discussions
9990 messages in 6758 discussions
2445 messages in 1638 discussions
183 messages in 110 discussions
684 messages in 442 discussions
1328 messages in 338 discussions
1471 messages in 1135 discussions
847 messages in 486 discussions
373 messages in 246 discussions
4108 messages in 2606 discussions
455 messages in 115 discussions
3006 messages in 2166 discussions
656 messages in 148 discussions
428 messages in 402 discussions
6/25/17
Bearing a striking resemblance to a stark British shoreline, this image is actually of an inverted crater on Mars: https://t.co/YzviPvT6x7 pic.twitter.com/sYelqJ2SD9
— NASA (@NASA) June 25, 2017
7/15/17
It's been awhile since I dropped a thread o' #Mars, so let's try something different today... pic.twitter.com/LtXRbFhQJ7
— Tanya Harrison (@tanyaofmars) July 14, 2017
7/15/17
1. The hues of #Mars' surface are generally thanks to dust cover—or (relative) lack thereof. Lighter areas = dusty, darker = less dusty. pic.twitter.com/EbsyOsVYVk
— Tanya Harrison (@tanyaofmars) July 14, 2017
7/15/17
4. Mars has huge volcanoes, including Olympus Mons, the tallest in the Solar System. But none have been active for >100 million years. pic.twitter.com/jLtCkBo4Rt
— Tanya Harrison (@tanyaofmars) July 14, 2017
7/15/17
6. Valles Marineris is often called the largest "canyon" in the Solar System. But it's actually a series of "chasmata." (Img: @Cornell) pic.twitter.com/5ycU3yUnvz
— Tanya Harrison (@tanyaofmars) July 14, 2017
7/15/17
14. Mars's surface is red due to iron oxide. But if you get below the rusty dust, it's often not red at all! pic.twitter.com/PtQ9UKFAJu
— Tanya Harrison (@tanyaofmars) July 14, 2017
7/15/17
15. When Spirit's right front wheel stopped working, it serendipitously dug a trench that exposed nearly pure silica—evidence of past water. pic.twitter.com/SlIjQCZGYb
— Tanya Harrison (@tanyaofmars) July 14, 2017
7/15/17
17. Newly-formed impact craters on Mars blast away the dust on the surface around them, revealing the underlying darker nature of Mars. pic.twitter.com/MM3VCtP8cV
— Tanya Harrison (@tanyaofmars) July 14, 2017
7/15/17
18. The south polar cap of Mars, made of CO2 ice, is mysteriously eroding away. The northern polar cap, made of water ice, seems stable. pic.twitter.com/FtrwsMLAvY
— Tanya Harrison (@tanyaofmars) July 14, 2017
7/15/17
Solar conjunction what’s your function? About every two years, Earth & #Mars end up on opposite sides of the sun https://t.co/Lr6MbBfkkH pic.twitter.com/21Uww7Rbc0
— NASA JPL (@NASAJPL) July 15, 2017