Austin on Edge as Police Scramble to Find ‘Serial Bomber’ After 4th Explosion by MANNY FERNANDEZ and CAITLIN DICKERSON


A fourth bomb triggered by a tripwire suggests a higher level of sophistication in the wave of bomb attacks that have unnerved the residents of Austin.

Published: March 19, 2018 at 02:04PM

from NYT


Austin Likely Facing ‘Serial Bomber,’ Police Chief Says by THE ASSOCIATED PRESS


Fear escalated across Texas’ capital city on Monday after the fourth bombing this month — a blast that was triggered this time by a tripwire, demonstrating what police called a “higher level of sophistication” than the package bombs used in …

Published: March 18, 2018 at 11:15PM

from NYT

The Nebra Sky Disk

It is considered the oldest known illustration of the night sky. But what, exactly, does it depict, and why was it made? The Nebra sky disk was found with a metal detector in 1999 by treasure hunters near Nebra, Germany, in the midst of several bronze-age weapons. The ancient artifact spans about 30 centimeters and has been associated with the Unetice culture that inhabited part of Europe around 1600 BC. Reconstructed, the dots are thought to represent stars, with the cluster representing the Pleiades, and the large circle and the crescent representing the Sun and Moon. The purpose of the disk remains unknown — hypotheses including an astronomical clock, a work of art, and a religious symbol. Valued at about $11 million, some believe that the Nebra sky disk is only one of a pair, with the other disk still out there waiting to be discovered. via NASA

Rotating Moon from LRO

No one, presently, sees the Moon rotate like this. That’s because the Earth’s moon is tidally locked to the Earth, showing us only one side. Given modern digital technology, however, combined with many detailed images returned by the Lunar Reconnaissance Orbiter (LRO), a high resolution virtual Moon rotation movie has been composed. The above time-lapse video starts with the standard Earth view of the Moon. Quickly, though, Mare Orientale, a large crater with a dark center that is difficult to see from the Earth, rotates into view just below the equator. From an entire lunar month condensed into 24 seconds, the video clearly shows that the Earth side of the Moon contains an abundance of dark lunar maria, while the lunar far side is dominated by bright lunar highlands. Currently, over 20 new missions to the Moon are under active development from four different countries, most of which have expected launch dates either this year or next. via NASA