Is the Moon’s orbit inclined sufficiently that, when it misses the Sun by the greatest amount north (or south), the lunar crescent could be seen in a telescope at new Moon? Probably not. The inclination of the Moon’s orbit to the ecliptic varies from 5.0° to 5.3°. French astronomer André Danjon (1890–1967) showed that no…
An unexpectedly bright comet is crossing a well-known part of the sky.
There's a cool sunspot group visible right now. If the weather is clear, go grab a safe solar viewer and check it out for yourself.
As a storm rages in Mars's atmosphere, two rovers on the surface and three orbiters above wait for the dust to settle.
A summer night in the Boston exurbs proves surprisingly rewarding.
Astronomers have assembled an armada of telescopes to observe Uranus in a way that hasn't been possible since the 1960s.
The innermost planet makes a fine appearance in the eastern sky during the last two weeks of July.
On Sunday evening Comet LINEAR (C/2006 VZ13) passes within kissing distance of the great globular star cluster Messier 3.
The dust clouds on Mars are blocking out so much sunlight that the Mars Exploration Rovers may not survive until the storm blows over.
Dust storms have curtailed all rover activity for nearly a month.
Amateurs capture Jupiter's spots in the act of jumping belts.
In the early morning hours of August 1st, you can see Mercury in the constellation Gemini.
Catch the Moon in eclipse before sunrise on August 28th.
The brightest asteroid swings by the King of Planets from August 28th to the 31st.
Missing totality makes an eclipse's partial phase all the more rewarding.
Just as predicted, the Aurigid shower delivered a burst of meteors created by particles shed by a comet more than 2,000 years ago.
For love or money, the Moon awaits you.
For heaven's sake, get out and look at Comet Holmes.
As of January 4th the comet, ever-enlarging and thinning, is still in naked-eye view but only if you have a fairly dark-sky site. Use binoculars to follow its next moves.
Greet your trick-or-treaters with two Halloween treats: a bit of candy and a view of Comet Holmes.
Venus Express project scientists are inviting amateur and professional astronomers to contribute Earth-based images of the planet made at infrared, visible, and ultraviolet wavelengths.
It may be dimming, but Comet Holmes is still unbelievably big and bright.
The Red Planet is now nearly as bright and appears nearly as big through a telescope as it will any time this year.
Mercury is a rewarding challenge for planetary astrophotographers, as this amazing image by Massachusetts amateur John Boudreau demonstrates.
The ringed planet is at its highest in the sky shortly before dawn in December. And the early-morning sky is full of other marvels, too.