Rare circumhorizontal arc (also known as fire rainbow) caused by small water droplets individually scattering light.

Lofoten, Norway 🇳🇴

Kurt Gödel, who was one of Albert Einstein's best friends in his later years, found a solution to general theory of relativity that modelled a strange, unusual and rotating universe allowing for backward time travel.

Mount Fuji, Japan.

MIT engineers have created a tiny crystal drug depot that delivers meds for months or even years with just one shot. news.mit.edu/2025/engineers…

A contact binary is a dual star system in which both stars are so close together that they’re touching or share an outer atmosphere. Most contact binary star systems are stable, but some are not. When these spectacular stellar pairs merge, they can potentially explode in a few

Frías Castle, Spain 🇪🇸

LISA is an experiment that sounds like science fiction: three spacecraft forming a laser triangle 2.5 million km per side, trailing Earth through space. It's also a rock-solid science case. It would be a real loss if the U.S. weren't a partner in this groundbreaking mission.

Northern lights 🌌

Comparison of the length of the day on the planets of the Solar System — Mercury: 58 days 16 hours; — Venus: 243 days 26 minutes; — Earth: 23 hours 56 minutes; — Mars: 24 hours 36 minutes; — Jupiter: 9 hours 55 minutes; — Saturn: 10 hours 33 minutes; — Uranus: 17 hours 14

Sunrise reflections in Estonia ✨

If you want to find the secrets of the universe, think in terms of energy, frequency, and vibration. - Nikola Tesla

Interesting history thread

This tweet 9 years ago was how I started the Autopilot, now AI, team at Tesla. Ashok, who now leads the team, was the first person I interviewed. Milan, who leads Optimus, also joined very early. Many of the key people in Tesla AI have been there from the beginning.

Yes

The NASA Artemis II crew needs you! 🧑‍🎨 On their journey around the Moon, the crew needs a zero gravity indicator plushie and you can design it. There are 2️⃣ weeks left to submit your designs! Learn more about the contest: freelancer.com/moon-mascot

MIT engineers have developed a new kind of fuel cell that could make zero-emissions aviation a reality, with 2X the efficiency of jet engines. news.mit.edu/2025/new-fuel-…

This month’s #NASAScience image features Cassiopeia A, one of the most studied supernova remnants. Using data from Chandra Observatory and NASA Webb Telescope, researchers have uncovered previously unseen structures within the stellar debris, offering new insights into the complex aftermath of a

Auroras from space always draw crewmembers to the Cupola. I love how this one illuminated our Dragon, and I also love the dance of satellites on the left in the latter part of the video. It’s interesting how the aurora creeps along the top of the atmosphere as it comes up over

Ancient map of Cairo