With little or no moon to ruin the show, this is a great year for watching the Perseid meteor shower. It’ll peak on the mornings of August 11, 12 and 13.
Best time to see Saturn in 2015 is here! Instructions for finding this beautiful golden planet … here.
A Blue Moon can be the second of two full moons in a month. Or it can be third of four full moons in a season. Next Blue Moon is the second full moon of July, 2015.
The intriguing cycle of closest and farthest moons. Plus, dates for 2015’s 13 perigees (closest points) and 13 apogees (farthest points).
Three planets are clearly visible at nightfall this month: Venus, Jupiter and Saturn. Mercury is fading – whereas Mars has already disappeared – into the glare of sunset.
Light is the fastest-moving stuff in the universe. It travels at an incredible 300,000 kilometers (186,000 miles) per second. So, in a year, light travels far.
Eta Aquarid going on now. Good for both the northern tropics and Southern Hemisphere. How to watch, history, radiant point, here.
You might see a lot or you might not see many, but if you stay in the house, you won’t see any.
Awesome Lyrid prospects this year! You might see 10 to 20 meteors per hour at the peak on the mornings of April 22åç and 23, with the nod going to April 23.
The shortest lunar month of 2015 starts with the April 18 new moon and ends May 18. Learn about the varying lengths of the lunar months, here.
The April 4, 2015 total lunar eclipse comes in the morning for North America, and in the evening for Eastern Asia, Indonesia, New Zealand and Australia. Here’s what to look for.
Three eclipses in one calendar month are rare. Three eclipses in one lunar month are more common. From 2000-2050, it happens 14 times.
Happy equinox, everyone! The 2015 vernal or spring (or fall) equinox comes on March 20 at 22:45 UTC (5:45 p.m. CDT).
There are currently 40 different Saros series in progress, each with its own assigned number. The total solar eclipse of March 20, 2015 belongs to Saros 120.
Finding star distances isn’t easy. Here’s how it’s done, and why astronomers recently modified the distance estimate to the famous star Betelgeuse.
From Earth’s North and South Poles, all the stars appear as circumpolar. No star rises or sets. At Earth’s equator, no star is circumpolar. And in between?
Groundhog Day – a celebration with its roots in astronomy – comes every year on February 2. It’s the year’s first “cross-quarter” day.
Will you see the Scorpion’s stinger stars – Shaula and Lesath – in the cold dawn sky? Look southeast anytime this month, to enjoy a Pawnee version of Groundhog Day.
Each calendar year has at least four eclipses – two solar and two lunar. Most years have four, but five, six or even seven eclipses are also possible.
No major meteor showers are predicted until the Lyrid shower, peaking on the morning of April 23, 2015. Between now and then … fireball season!