Reflective surfaces of other satellites occasionally catch the Sun and temporarily brighten by several magnitudes as they glide across the sky, but there's nothing like the flare produced by an Iridium satellite. Each of the approximately 66 Iridiums in orbit have three door-sized aluminum antennae treated with highly reflective, silver-coated Teflon for temperature control. When the angle between observer and satellite is just right, sunlight reflecting off an antenna can cause the satellite to surge from invisibility up to magnitude –8.5 in a matter of seconds.
The existing constellation of satellites is being replaced with newer models with less reflecting antenna. A few older models might be left in parking orbits but in a few years the flares will mostly be a thing of the past.
Several years ago the Smithsonian had an Iridium conveniently hanging such that you could create your own flare with your camera's flash. Anyone else do that?
India's surveyor general Swarna Subba Rao said, We will remeasure it,Two years have passed since the major Nepal earthquake and there's doubt in the scientific community that it did in fact shrink.
A team will depart once winter passes to take measurements to determine the current height Everest.
We found bugs in Samsung Galaxy phones that can be triggered remotely via SMS, which when combined provide opportunities for ransomware peddlers. Samsung Mobile Security Team were quick to fix the issues, providing a decent example of how coordinated disclosure should happen.
"Engineering meets art in the parking lot and things explode." -- Garry Peterson, about Survival Research Labs