RS Puppis is a Cepheid variable star whose brightness varies by a factor of five roughly every 40 days. Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)-Hubble/Europe Collaboration; Acknowledgment: H. Bond (STScI and Penn State University)
As an astrophotographer, you might feel that you will eventually run out of targets. I disagree — amateurs are discovering new targets all the time, and old targets can look brand…
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