First spied last year, an object designated 2015 RR245 turns out to be one of the largest and most distant objects yet found orbiting the Sun.
A new Hubble Space Telescope image shows the very heart of the Crab Nebula, one of the most studied supernova remnants.
Abandoned for 25 years, a 12-meter antenna once used during the Cold War is now introducing astronomy students to the radio universe.
Grab a pair of binos and look for the Mercury-Venus conjunction 15 minutes after sunset on Saturday – it’s a challenge! Tuesday sees the full Moon rise, with Altair high to its upper left.
Paddle the Milky Way’s Dark River
Take an imaginary journey in a boat down the Milky Way’s Great Rift, exploring rich star clouds and dark nebulae along the way.
Sky & Telescope’s astronomy podcast takes you on a guided tour of the night sky. In early evening look for Jupiter in the southwest, with Mars and Saturn embedded in Scorpius toward south.
Why, and how, you should sketch your observations through a telescope.
2017 Eclipse Bulletin
On Monday, 2017 August 21, a total eclipse of the Sun will be visible from the contiguous United States for the first time since 1979. Eclipse Bulletin: Total Solar Eclipse of 2017 August 21 is the ultimate guide to this highly anticipated event. Written by two of the leading experts on eclipses, the bulletin is a treasure trove of facts on every conceivable aspect of the eclipse. The exact details about the path of the Moon’s shadow can be found in a series of tables containing geographic coordinates, times, altitudes, and physical dimensions. A number of high resolution maps plot the total eclipse track across the USA. They show hundreds of cities and towns in the path, the location of major roads and highways, and the duration of totality with distance from the central line.