11-09-06 Researchers at Northwestern University have created a new kind of cloaking material that can render objects invisible in the terahertz（兆赫） range. Though this design can't translate into an invisibility cloak for the visible spectrum, it could ha...

10-04-22 Towards the heart of the Milky Way, 5500 light-years from Earth in the constellation（星座，荟萃） of Scorpius (the Scorpion), the Cat's Paw Nebula stretches across 50 light-years. In visible light, gas and dust are illuminated（照明，启发） by hot...