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Are those stars? The “iduy37thq” image [0], for example, has various star-like points of light on top of the planet itself in addition to appearing in the backg
by biot 7y ago
Are those stars? The “iduy37thq” image [0], for example, has various star-like points of light on top of the planet itself in addition to appearing in the background.
[0] http://hst.esac.esa.int/ehst-sl-server/servlet/data-action?RETRIEVAL_TYPE=PRODUCT&ARTIFACT_ID=iduy37thq_flt.jpg http://hst.esac.esa.int/ehst-sl-server/servlet/data-action?R...
- Ididntdothis 7y agoThis look like the noise I get from my camera when I take very long exposures (> 10 minutes). The sensor starts heating up and producing these dots.
- xioxox 7y agoNo they're probably not (I'm an astronomer). They're likely cosmic rays. When I've used Hubble data, then the processing uses multiple images to remove the cosmic rays (which aren't in common between images).
- metafunctor 7y agoI'd love to understand how those bright dots and lines (so, cosmic rays?) appear on these images.
- xioxox 7y agoThey're just high energy particles that interact with the CCD cameras typically used for astronomy. You get a bright point or particle track, as the particle interacts with the CCD producing electrons. This is worse for space telescopes, as there are more cosmic rays in space. For some simple information see: http://spiff.rit.edu/classes/phys373/lectures/cosmic_rays/cosmic_rays.html http://spiff.rit.edu/classes/phys373/lectures/cosmic_rays/co...