Complex sentence: One of the most well-known hot Jupiters is 51 Pegasi b, nicknamed "Bellerophon", discovered in 1995 and was the first extrasolar planet found orbiting a Sun-like star.
Split into simpler sentences: One of the most well-known hot Jupiters is 51 Pegasi b, nicknamed "Bellerophon". Discovered in 1995, it was the first extrasolar planet found orbiting a Sun-like star.