Magazine

Observing

Phil Harrington’s binocular universe (November 2007 online extra)

Science

Lemaître, the calculator

Observing

Tough questions for your prospective eye surgeon

Science

Presto change-o!

Exotic Objects

An animated look at black-hole spin

Exotic Objects

Do black holes ever disappear?

Science

Jupiter gleams in the evening

Observing, The Moon

Stephen James O’Meara’s secret sky: The Moon shows “her” true colors

Science

Bob Berman’s strange universe: Equator for sale

Observing

Glenn Chaple’s observing basics: An asterism by any other name

Science

Does the fact that our universe is accelerating imply that it will expand forever?

Observing

Phil Harrington’s binocular universe: Strum the Harp