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September's sky features brilliant Venus, the Milky Way's hazy center, and the seasonal turning point of the equinox. The month ends with a glowing Harvest Moon rising near Saturn and faint Neptune.

Solar sails pushed by powerful lasers could reach incredible speeds, but relativity may eventually make the light itself work against them. At around 75% of the speed of light, scattered photons can begin creating drag, adding a surprising obstacle . ...

A search for one mysterious particle unexpectedly revealed evidence for two different structures that may belong to the bizarre family of exotic subatomic particles known as XYZ states. The findings could help physicists uncover new ways that quarks ...

NASA-funded studies suggest Earth's climate has been influenced by both the Sun's travels through dense regions of the Milky Way and the violent superflares of its youth. Those events may help explain ancient ice ages as well as how early Earth ...

NASA has brought two of Swift's telescopes back online after technical problems derailed a commercial mission intended to rescue the aging observatory by raising its orbit. With atmospheric drag pulling the spacecraft downward faster than expected, . ...

NASA and SpaceX have delayed Crew-13 after finding an oxidizer leak in the Dragon spacecraft's propulsion system during prelaunch preparations. Engineers are investigating the problem before the four-person crew can begin its journey to the ...

Scientists have uncovered hidden complexity inside two ultrathin superconductors that seemed much simpler than they really are. Niobium diselenide and tantalum disulfide appeared to have a single superconducting state, but highly sensitive ...

Physicists have demonstrated a new way to entangle distant quantum bits without the constant measurements and active control normally required. The team created a "quantum bath," a shared environment filled with correlated microwave photons that ...

NASA's Roman Space Telescope has launched on a million mile journey to L2, where it will scan huge portions of the cosmos for clues about dark matter, dark energy, and distant worlds. With survey speeds roughly 1,000 times faster than Hubble and a .. ...

Rocky planets may have been able to start forming just 100 million years after the Big Bang, thanks to enormous early supernovae that scattered planet-building elements across space. Simulations found enough solid material and water around a young .. ...