to construct a bent or "butterfly-shaped" sheet of four Pd atoms. These metals were stabilized by bonding with benzene rings dangling from the silicons. The entire (left) and the core (right) ...

This week’s small-telescope target is the Black Swallowtail Butterfly Cluster in northern Ophiuchus. This open cluster also goes by the designation IC 4665. It’s OK if you’ve never observed ...

You’ll find it by pointing your telescope 8.5° northwest of magnitude 2.8 Rho (ρ) Puppis, or a little more than 3° south of open cluster M46. The Albino Butterfly lies some 3,500 light-years ...