Scientists discover a planet orbiting its red dwarf star backward | #gj 3090 b # GJ 3090 # retrograde exoplanet # backward orbit planet # planet orbiting backward # first retrograde planet around M dwarf # M dwarf exoplanet # red dwarf planet # GJ 3090 b orbit # 136 degree exoplanet # GJ 3090 c # sub-Neptune # NIRPS # La Silla Observatory # Astronomy and Astrophysics # exoplanet discovery # planetary formation # planetary migration # retrograde orbit # astronomy news