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- 1New Satellite Engine Would Use Air as Fuel●New Satellite Engine Could Use Earth's Atmosphere to Stay in Orbit Indefinitely
Engineers have unveiled a satellite propulsion concept that scoops up molecules of Earth's upper atmosphere and uses them as propellant, potentially letting satellites in low orbit refuel themselves and stay aloft indefinitely instead of falling back. The idea could cut the cost and waste of constant resupply missions and transform how long-lived observation and communications satellites are designed.
- 2Earth's atmosphere has gotten less dusty, puzzling scientists▼In a mysterious reversal, Earth’s atmosphere has gotten less dusty
Researchers report that the amount of dust in Earth's atmosphere has declined, a reversal of the long-term trend. The shift is described as mysterious, with the causes not yet fully understood. Dust affects climate, weather patterns and air quality, so scientists are paying close attention to what is driving the change and what it could mean for warming.
- 3Private spacecraft burns up after failed NASA telescope rescue▼Private spacecraft burns up in Earth's atmosphere after failing to rescue aging NASA telescope
A private spacecraft sent to service or boost an aging NASA telescope failed in its mission and has burned up in Earth's atmosphere. The attempt, which would have extended the observatory's life, ended without a rescue, raising questions about the telescope's future and the risks of commercial deep-space servicing missions.
- 4Sphere's 4D Wizard Of Oz Hit Could Boost Its Stock▼4D Wizard Of Oz Success Could Be A Game Changer For Sphere Entertainment Stock
Sphere Entertainment's immersive 4D staging of The Wizard of Oz at its Las Vegas Sphere venue is being credited with driving strong audience turnout, and analysts suggest its success could materially improve the company's stock outlook. The experience is viewed as a test of whether Sphere's format can host recurring, licensed content profitably, making it a potential turning point for investor sentiment toward the company.