Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70

26. 03 2023

Exoplanets

An extreme test case for planet formation: a close-in Neptune orbiting an ultracool star

20. 03 2023

Stars

Astronomers have discovered a brown dwarf orbiting the red giant HD 18438

Astronomers led by Byeong-Cheol Lee have made a groundbreaking discovery, detecting a brown dwarf orbiting the red giant HD 18438. With a radius of 89 times that of the Sun, HD 18438 is now the largest known star to be orbited by an exoplanet or brown dwarf.

15. 03 2023

Exoplanets

Planetary Population Synthesis and the Emergence of Four Classes of Planetary System Architectures

10. 03 2023

Exoplanets

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions