For decades, scientists believed that lead-208, a "doubly magic" and highly stable atomic nucleus, was perfectly spherical.

In this project, we will also optimize our rocket — by changing the fin or nose cone shape — but we'll take it one step further by calculating how high your rocket is flying. First ...

Compared to chemical rockets, EP systems are much more fuel ... velocity distribution shows a near-Maxwellian [bell-curve-like] shape in the beam direction and what they describe as a "top-hat ...