Bedtime Astronomy

Researchers at the University of Manchester have developed a modeling framework to reduce the growing risk of satellite collisions in Earth’s orbit. As constellations expand, collision probability increases — threatening long-term space sustainability.

The study integrates safety considerations into early mission design, showing how satellite size and altitude directly affect debris risk. The goal is to resolve a growing paradox: satellites are essential for climate monitoring, yet their proliferation endangers the very orbital environment they depend on.

This approach aims to preserve both high-quality Earth observation and the future stability of near-Earth space.

This episode includes AI-generated content.

New research published in The Planetary Science Journal suggests the Moon is more tectonically active than once believed. Scientists have mapped thousands of small mare ridges—young geological features formed as the Moon slowly contracts.

These structures appear linked to lobate scarps, indicating the lunar crust is still shrinking and capable of generating moonquakes. The discovery reshapes our understanding of lunar stability and could be crucial for selecting safe landing sites and protecting future astronauts on upcoming Moon missions.

This episode includes AI-generated content.

The EXCITE mission is using a specialized infrared telescope carried by a high-altitude balloon to study the atmospheres of distant hot Jupiters. Floating above most of Earth’s atmosphere, the observatory can continuously monitor these exoplanets and build three-dimensional maps of their temperature structures and weather patterns.

Unlike heavily scheduled space telescopes such as the James Webb Space Telescope, EXCITE offers a cost-effective platform optimized for capturing full orbital phase curves. After a successful 2024 test flight that validated its stabilization and cooling systems, future launches over Antarctica aim to deepen our understanding of exoplanet climates and atmospheric chemistry

This episode includes AI-generated content.

Scientists from the Initiative for Interstellar Studies have proposed an ambitious mission to intercept 3I/ATLAS, the third known interstellar visitor to enter our solar system. Because the object was detected late and is traveling at extreme speed, a direct launch is no longer possible.

Instead, researchers outline a 2035 mission using a Solar Oberth maneuver—diving close to the Sun for a powerful velocity boost—combined with a gravitational slingshot around Jupiter. The spacecraft could reach its target after a decades-long journey, offering a rare opportunity to study material from another star system using current technology. Such a mission could transform our understanding of extrasolar planetary formation without requiring true interstellar travel.

This episode includes AI-generated content.

Astronomers are grappling with the Hubble tension—a major conflict in measurements of how fast the universe is expanding.

Data from the cosmic microwave background point to a slower rate, while supernova observations suggest a faster one. New research proposes that primordial magnetic fields from the early universe may have influenced hydrogen formation and altered cosmic expansion. 

Recent simulations indicate these ancient magnetic effects could help reconcile the discrepancy, offering fresh insight into the physics of the infant universe and the origins of cosmic structure.

This episode includes AI-generated content.