Here are a few interesting items that people dwelling in physics or related areas might find interesting and useful:

• For young researchers: S. Weinberg’s Four Golden Lessons.
• David Tong’s lecture notes.
• Erik Neumann’s list of physics simulations.
• P. Falstad’s applets on math and physics simulations.

Interested in space science and astronomy in general? Have a look at the following items:

• Astronomy Picture of the Day, APOD.
• Hubble site.

For people interested in Gravitational Wave (GW) astrophysics:

• Summaries of LIGO-VIRGO-KAGRA scientific publications.
• GW Open Data Workshop.
• ICTS schools on GW Astronomy.
• Emanuele Berti’s list of must-read papers.

On Gravitational Lensing:

• Gravitational Lenses by Schneider, Ehlers and Falco.
• Lecture notes by Narayan and Bartelmann.
• Massimo Meneghetti’s lecture notes.

Other interesting items:

• Black holes for bedtime by C V Vishveshwara.
• Piled Higher and Deeper comics.
• Phil Plait’s Bad Astronomy.