Gallery: Space Photos of the Week: Codependent Spiral Galaxies Dunno Who They Are Anymore
<a href="https://www.nasa.gov/image-feature/goddard/2017/hubbles-glittering-frisbee-galaxy">NASA</a>01SPoWMarch23-05.jpg
Spiral galaxies like this one function like a frisbee, spinning into the universe. This one appears oval rather than circular, since you see it from its side.
<a href="https://www.nasa.gov/image-feature/jpl/pia21567/the-hills-are-colorful-in-juventae-chasma">NASA</a>02SPoWMarch23-01.jpg
This enhanced-color photo shows sand dunes in Mars’ Juventae Chasma canyon, where many hills are half a mile tall.
<a href="http://hubblesite.org/news_release/news/2017-12">NASA</a>03SPoWMarch23-08.gif
The supermassive black hole, weighing more than one billion suns, was propelled from the center of a far-off galaxy, possibly powered by gravitational waves.
<a href="https://www.nasa.gov/feature/jpl/ice-in-ceres-shadowed-craters-linked-to-tilt-history">NASA</a>04SPoWMarch23-06.gif
The illumination of Ceres, a dwarf planet, changes based on its axial tilt (its angle as it spins around the sun).
<a href="https://www.nasa.gov/image-feature/goddard/2017/hubble-spots-two-interacting-galaxies-defying-cosmic-convention">ESA</a>05SPoWMarch23-10.gif
These two galaxies (the blue glow on the right, and the smaller one in upper left) interact, influencing each other with gravitational forces. They’ve distorted each other enough so that it’s difficult to tell what each looked like before they started reshaping each other’s structures.
<a href="http://www.eso.org/public/images/potw1712a/">ALMA</a>06SPoWMarch23-03.jpg
This image shows glowing dust inside a protocluster, where a massive protostar grows in the stellar nursery.
<a href="https://www.nasa.gov/image-feature/jpl/pia21571/dunes-of-the-southern-highlands">NASA</a>07SPoWMarch23-09.gif
Mars’ surface is dotted with sand dunes, including this field in the planet’s Southern hemisphere, composed of crescent-shaped dunes.
<a href="https://www.nasa.gov/image-feature/jpl/pia20526/a-resolution">NASA</a>08SPoWMarch23-04.jpg
This close-up, taken from 70,000 miles away, shows the detailed structures of Saturn’s A ring.
<a href="https://www.nasa.gov/image-feature/jpl/pia21568/gullies-in-winter-shadow">NASA</a>09SPoWMarch23-02.jpg
This image shows gullies on Mars that have actively formed in the winter, while carbon dioxide frosts the ground.
