The 'light' refers to bremsstrahlung.

Other numbers are largely unaffected, but anyone using '4' for their certificate key is urged to upgrade to '5'.

I don't see why people have trouble doing this at room temperature. Using hot rivets would honestly have been MORE work.

"I'm doing really well on the Hertzsprung-Russell academic diagram, which has spectral class on one axis and Rate My Professors rating on the other."

Atmospheric transmission spectroscopy has revealed that the sunsets from the observatory are really pretty.

Although NASA agreed that Voyager 2 'seemed lonely' they decided against launching a companion orbiter mission after further measurements indicated that the spacecraft actually preferred the peace and quiet.