Spot the International Space Station (and other bright satellites). Sightings can occur at dusk or dawn when the ground may be dark but the sun is still shining over the edge of Earth on the spacecraft high overhead. So it is dark where you stand but bright about 250 miles overhead where the station is orbiting.
Heavens Above:
Select your viewing location for detailed information on viewing ISS, Hubble and other satellites. Brightnesses are listed in astronomical magnitudes where lower numbers (especially negative numbers) are brighter. In dark skies the theoretical limit for being able to see stars is about 6th magnitude. Realistically it is hard to spot anything dimmer (higher) than 3.0. ISS can reach brighter than –3.0, the brightest thing in the night sky except for the moon (-12.7 when full) or Venus (-4.9).
Spot the Station:
NASA’s tool for spotting ISS. Can send you an email and/or text that a pass is upcoming.
http://spotthestation.nasa.gov
Space News and Information
Spaceflight Now:
An excellent source for current news. They have a “Launch Schedule” page of upcoming launches. They do realtime updates of countdown events too. It is also an excellent source of current aerospace, and occasionally astronomy, news.
NASA Spaceflight:
Not a NASA site, in spite of its name, but good for more technical news (for fellow geeks) especially about human spaceflight.
http://www.nasaspaceflight.com
Unmanned Spaceflight:
Prefer robots? A discussion board about robotic spaceflight. Can be pretty technical.
http://www.unmannedspaceflight.com
The Space Review:
An online journal of space history, politics and book reviews. Contains a series of essays written at a popular reading level added each month.