What is this one? A pulsar or neutron star?


What is this?

I’m afraid it’s more boring than that: It’s a giant space rock… the moon. The WISE satellite (that’s where the unWISE image layer comes from) scans in a way where it crosses the moon’s path once a month, and the moon is so bright that even when the satellite isn’t pointed right at it, it’s very bright and leaves lots of artifacts in the processing. If you look at the “unWISE W1/W2 NEO1” layer (which includes some new data but also has better handling of the moon), that thing goes away. Sorry!

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