Europa takes a trek across Jupiter
Back to Article List The icy moon Europa transits Jupiter tonight, followed by its shadow. Now past opposition,…
The Sky Today on Saturday, February 7: Ganymede disappears
Back to Article List Jupiter’s largest moon, Ganymede, passes behind the planet’s disk in an occultation tonight. Watch…
Boötes’ brightest cluster, NGC 5466
Back to Article List An ancient ball of stars, globular cluster NGC 5466 is visible in the early-morning…
The Sky Today on Saturday, January 24: Psyche makes its turn
Back to Article List Asteroid Psyche has switched from retrograde to prograde motion on the sky. You can…
Psyche moves north of Aldebaran
Back to Article List Asteroid 16 Psyche is easy to find this evening as it moves a less…
The Sky This Week from Jan. 9 to 16: Jupiter at opposition
Jupiter looms large in this stunning map of the gas giant, comprised of Hubble Space Telescope data. Credit:…
Zoom in on the Perseus Cluster
Back to Article List Galaxy NGC 1275 is the brightest member of the Perseus Cluster, an excellent target…
The Sky Today on Sunday, January 4: The Winter Hexagon
Back to Article List A huge asterism is visible in the east, rising after sunset this evening. Trace…
The evolution of solar imaging
Sunspots are active regions where the Sun’s magnetic field contorts itself into loops and arcs. Solar imaging captures…
The Sky Today on Thursday, January 1: Follow Saturn to Neptune
Back to Article List Saturn and Neptune lie close together in the evening sky. Use the brighter ringed…
The Sky Today on Thursday, January 1: Follow Saturn to Neptune
Back to Article List Saturn and Neptune lie close together in the evening sky. Use the brighter ringed…
Celebrate with the Christmas Tree Cluster
Back to Article List Check out a lovely open cluster of stars that forms the shape of an…