We propose to conduct a unique and very efficient Pa-beta imaging (1.4hrs science time!) of the best-studied galaxy cluster in formation, called "Spiderweb" protocluster, at z=2.16, with the NIRCam F405N filter. Our primary goal is to map the entire star formation activities across this starbursting protocluster, and within individual galaxies

The evolution of the most massive stars is a puzzle with many missing pieces. Statistical analyses are key to providing anchors to calibrate theory, but performing these studies is an arduous job. The state-of-the-art integral field spectrograph Multi Unit Spectroscopic Explorer (MUSE) has stirred up stellar astrophysicists, who are excited about

Despite stellar magnetic activity being present in most cool stars, its effects on spectroscopic observations are still not well understood. Several activity indicators are routinely used to identify activity-related signals in radial velocity (RV) measurements, but not all indicators trace exactly the same effects, nor are any of them always