🚀 NASA Pushes Artemis II To April

🚀 Artemis II rocket rollback issue

🌌 Planets scientist fatally shot

🪐 Inside-out solar system discovered

💫 Mysterious TeV source revealed

🌀 Neutron star gravitational memory

NASA (National Aeronautics and Space Administration) engineers are troubleshooting the Artemis II rocket after observing an issue with its upper stage, prompting preparations for a potential rollback for extensive repairs.

The problem involves an interrupted flow of helium to the Space Launch System's interim cryogenic propulsion stage, which is essential for pressurizing the liquid hydrogen and oxygen propellant tanks.

A rollback to the Vehicle Assembly Building will cause the mission to miss its March launch window, though NASA officials believe the April opportunity could still be preserved pending repair outcomes.

The scientific community mourns Caltech research scientist Carl Grillmair, an astronomer with four decades of experience studying galactic structures and exoplanets, who was tragically killed at his home.

Grillmair earned a NASA exceptional scientific achievement medal in 2011 for his work detecting indications of water on a distant exoplanet orbiting another star, a landmark astronomical achievement.

Colleague Sergio Fajardo-Acosta described the discovery as "monumental," advancing the search for life-supporting conditions and contributing significantly to our understanding of the Milky Way galaxy's formation and history.

An international team led by McMaster University astronomers studied the distant planetary system LHS 1903, discovering an architecture that directly challenges long-standing theories of how solar systems form.

Using the European Space Agency’s CHEOPS satellite, the team found a rocky planet, LHS 1903 e, in the system's outer region, following two gas giants—a completely inverted arrangement.

According to researcher Ryan Cloutier, this supports an inside-out planet formation model, where planets form sequentially, with the outer world forming after the system's gas had already depleted.

Chinese Academy of Sciences researchers analyzed the powerful cosmic ray source LHAASO J2108+5157, presenting strong evidence that it originates from a previously unassociated pulsar wind nebula in our galaxy.

The LHAASO (Large High Altitude Air Shower Observatory) instrument detected gamma rays exceeding 100 TeV, with a spectral index of -2.1 suggesting a leptonic origin from inverse Compton scattering.

This discovery, according to the paper's authors, identifies the source as a "PeVatron"—a powerful cosmic particle accelerator—offering a key natural laboratory for studying extreme energy physics in our galaxy.

Max Planck Institute physicists developed a new theoretical framework for detecting the gravitational wave "memory effect," a permanent distortion of spacetime predicted to follow major cosmic events like mergers.

The model predicts a permanent spacetime displacement strain of h ~ 10⁻²⁶ resulting from anisotropic neutrino emissions during a core-collapse supernova, a signal potentially detectable by next-generation observatories.

Researchers state that a confirmed detection would provide an entirely new test of general relativity's nonlinear nature and unlock a novel method for studying the internal physics of supernovae.