GJ 3929 b

[5] Later, observations using the NEID spectrometer on the WIYN 3.5 m Telescope measured the planet's mass to be 1.75±0.45 M🜨; and observations using the ARCTIC imager, plus photometry from TESS and LCOGT, constrained the planet's radius to 1.09±0.04 R🜨, this time giving a higher density of 7.3±2 g/cm3 (about 33% larger than Earth's[a]).

[4] As a terrestrial planet that orbits in the Venus zone of its star, GJ 3929 b classifies as a Venus-like planet, having a planetary equilibrium temperature of 295 °C and receiving planetary insolation 17 times greater than that of Earth receives from the Sun.

[4] GJ 3929 b is an excellent planet for atmospheric study with the James Webb Space Telescope.

[4] GJ 3929 b was discovered by a team of astronomers led by Jonas Kermer, from the Heidelberg University in Germany.

[5] GJ 3929 is a red dwarf of spectral type M3.5V[7] that is located 51.6 light years from Earth, in the constellation Corona Borealis.