Nowadays, spatiotemporal information, positioning, and navigation services have become critical components of new infrastructure. Precise positioning technology is indispensable for determining ...

An unexpected moment captured from orbit has offered a rare glimpse into the growing complexity of Earth’s low orbit environment. A satellite image, discovered on Google Earth, appears to show a ...

At 10 microns, the wavelength at which water vapor in a planet’s atmosphere shines brightest, a sun-like star remains a million times brighter than an Earth-sized companion. That difference has long ...