The Hubble Space Telescope captured an image of a distant star casing “bat wing” shadows into space. The star’s bright light is hitting a disk …
That so-called “bat shadow” is an indication that the star is surrounded by a disc of matter that will eventually form the features we see in places like our own solar system — namely, planets and moons and asteroids. We can see the bright shine of the star but if we were directly in line with its disc, it may be partially shrouded in the same shadow we see beaming from either side of it.
Wait, flapping? It’s true! Hubble’s observations of the faraway system appear to show changes in the shape and orientation of the shadows, suggesting that the ring of debris circling the star isn’t uniform, and the light beaming from the star takes on sightly different appearances based on the shape of that ring. The wobble of the ring may be due to a planet also orbiting the star, embedded within the debris disk.
“You have a star that is surrounded by a disk, and the disk is not like Saturn’s rings – it’s not flat,” Klaus Pontoppidan of the Space Telescope Science Institute. “It’s puffed up. And so that means that if the light from the star goes straight up, it can continue straight up – it’s not blocked by anything. But if it tries to go along the plane of the disk, it doesn’t get out, and it casts a shadow.
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