First moon found beyond solar system is as big as a planet
Astronomers reported CD-35 2722 B, a Jupiter-mass-scale companion on a ~170-day oval orbit around a brown dwarf, blurring the moon–planet boundary using radial-velocity data.
What happened: radial-velocity detection of a large companion around a brown dwarf
Astronomers reported detecting a large companion orbiting a brown dwarf using the radial-velocity technique, which infers the presence of an orbiting body by measuring periodic shifts in a host object’s spectral lines. The companion is designated CD-35 2722 B.
