A search for a fifth planet around HR 8799 using the star-hopping RDI technique at VLT/SPHERE
https://www.aanda.org/articles/aa/full_html/2021/04/aa38794-20/aa38794-20.html
Wide-orbit exoplanets are common. Analysis of nearly 20 years of OGLE microlensing survey data
https://arxiv.org/abs/2104.02079
OGLE-2018-BLG-1185b : A Low-Mass Microlensing Planet Orbiting a Low-Mass Dwarf
https://arxiv.org/abs/2104.02157
Significant improvement in planetary system simulations from statistical averaging
https://arxiv.org/abs/2104.02179
Large density deficit of Earth’s core revealed by a multi-megabar primary pressure scale
https://arxiv.org/abs/2104.02076