Jupiter is the Solar System’s largest planet, about 318 Earth masses, with a rotation period of roughly 9.9 hours per day. It is composed mainly of hydrogen and helium, with a metallic hydrogen layer that powers a strong magnetic field via a dynamo. The Great Red Spot is a storm at least 300–350 years old,…
Read more
Perseids peak on August 12–13, 2025 with 50–100 meteors per hour in the Northern Hemisphere, best after midnight as the Moon wanes. Geminids peak on December 13–14, 2025 with 100+ meteors per hour and the first-quarter Moon sets early. Quadrantids peak on January 3–4, 2026 with about 120 meteors per hour over roughly a four-hour…
Read more
The Nancy Grace Roman Space Telescope is planned to launch in late 2026 (latest commitment by May 2027) aboard SpaceX’s Falcon Heavy to a halo orbit around the Sun-Earth L2, about 1.5 million kilometers from Earth. Roman uses a 2.4-meter primary mirror repurposed from Hubble and a 300-megapixel Wide Field Instrument that covers about 0.28…
Read more
