alt Hacker NewsImage processing is a great way to get clean pictures but takes you further from direct observation. You could if extremely unlucky remove a supernova from your image not just meteors and cosmic rays.
Image processing is a great way to get clean pictures but takes you further from direct observation. You could if extremely unlucky remove a supernova from your image not just meteors and cosmic rays.
Extremely unlikely.
A supernova peaks over the course of days, and fades slowly over months to years. They also remain static relative to the background stars, as do all astronomical phenomena outside our Solar System, even over the span of a day.[1]
Even a very-rapidly-peaking kilonova (neutron-neutron star collision) though they peak quite rapidly (short gamma-ray bursts, or SGBs, last about two seconds) have durable remnants lasting weeks.
The transient phenomena discussed here occur largely at the scale of a few seconds at most, often far less, and most move across a significant span of sky within that time.
More likely is that a meteor impact on the Moon (or other Solar System body) might be missed, but those are sufficiently small targets that interference such as we're discussing would not be a significant noise source. Space-based observation of, e.g., comet collisions with Jupiter or Saturn would eliminate LEO satellite noise entirely, though cosmic ray interference would remain a concern.
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Notes:
1. An object moving at 0.99c at the distance of the nearest star, 4 light years, would cover slightly less than 0.04 degrees per day. Much of the Universe is at somewhat greater distance than even this.