Space Physics Digest

Large-Scale Cosmic Structures

• 🔥 Vela Supercluster Mapping: Researchers mapped the Vela Supercluster, a 300 million light-year across structure...

c emerges from spacetime geometry, not just light.

• Sets cosmic speed limit, preventing causality violations
• Connects matter to energy
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Astronomers have fully mapped the Vela Supercluster, hidden behind the Milky Way's dust in the Zone of Avoidance:

• 300 million light-years across...

Key cosmology clarifications from Leonard Susskind:

• Big Bang didn't explode from a single point – it happened everywhere at once
• Universe has no...

SpaceX Launch Updates

• 🔥 Falcon Heavy ViaSat-3 F3 Scrubbed: SpaceX scrubbed the Falcon Heavy launch of ViaSat-3 F3 at T-28 seconds due to...

Gravity bends light around massive objects like stars and black holes, as predicted by General Relativity.

Key highlights from this comprehensive...

Dramatic Revision in cosmic lifespan: New study cuts estimate from 10¹¹⁰⁰ years to 10⁷⁸ years, challenging standard deep-time models.

• Hawking...

Cosmic puzzle explained: Life thrives near Sun-like stars today because dwarfs' close habitable zones cause tidal locking and flares strip...

Key scrub details:

• Weather scrubbed attempt at T-28 seconds on April 27 (10:21 a.m. EDT window from LC-39A).
• Next try: April 28.

Mission...

High commercial cadence: Two Falcon 9 missions from Vandenberg Space Force Base SLC-4E next week.

• Starlink 17-36 (Apr 29, 7-11pm PT): Deploys 24...

Student-led breakthrough: Undergrads at University of Hamburg built a simple cavity detector -- a 'cosmic radio' -- to hunt axions, using limited...

Fundamental Physics Explainers

• 🔥 Speed Limits in Relativity: Marc Lachièze-Rey explains why no speed exceeds light using rapidity in hyperbolic...

Artemis II's historic crewed flyby delivered stunning 4K visuals of humans looping the Moon—first since 1972—validating Orion life-support for...

NASA will send a nuclear powered rocket to Mars, as explained in this 15:02 YouTube video from The Space Race channel. Focuses on Mars colonization updates alongside SpaceX and NASA missions.

• Naked-eye beacon: Magnitude 2.2 at Cassiopeia's W peak, 549 ly away, B-type star 5x hotter than Sun.
• Classic Be star: Rapid rotator flings H...

• 2015 Canberra Experiment: A single helium atom lacks a definite past until observed, with the choice made after the event—yet the atom obeys it.
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Relativity's hard limit stems from spacetime's hyperbolic geometry, where speed (tanh of rapidity) asymptotes to c but never exceeds it.

Practical...

• Eternal inflation spawns bubble universes beyond our horizon with different physical constants and laws.
• Bubbles feature varying particle masses,...

Space Mission Updates

• 🔥 Falcon 9 CAS500-2 Launch: SpaceX Falcon 9 launch of CAS500-2 and others from SLC-4E at Vandenberg SFB has GO status...

Lunar highlights: NASA's Artemis, VIPER; ISRO-JAXA LUPEX; CNSA Chang'e 7 & 8; Blue Origin Blue Moon Mark 1.

Mars focus: Mars Sample Return, ESA...