Guide to Space
How Long is a Day on the Moon?
A single day on the Moon lasts the equivalent of 29.5 Earth days, which is the result of its tidally-locked…
Messier 50 – the NGC 2323 Open Star Cluster
Located between the Monoceros and Canis Major constellations, about 3,200 light years from Earth, is the heart-shaped open star cluster…
The Corvus Constellation
Located in the southern celestial hemisphere is the constellation Corvus (Latin for "the Raven"), one of the original 48 constellations…
How Much Stuff is in a Light Year?
Determining how much stuff is a single light year is daunting, considering how big the Milky Way is. But doing…
How Does Mercury Compare to Earth?
Mercury and Earth are a study in contrasts, with serious differences in their orbits, atmospheres, surface temperatures, and annual/diurnal cycles.…
How Far Does Light Travel in a Year?
Light travels at a speed of 299,792,458 m/s (1080 million km/h; 671 million mph), which works out to about 9,460.5…
Messier 49 – the NGC 4472 Elliptical Galaxy
Located in the constellation Virgo, and at a distance of 55.9 million light years from Earth, is Messier 49 -…
Is Time To Go Back to Uranus and Neptune? Revisiting Ice Giants of the Solar System
We’ve only seen Uranus and Neptune one time up close. There are now some mission ideas in the works that…
What is the Smallest Planet in the Solar System?
Of all the planets in the Solar System. Mercury is now the regarded as the smallest, with a mean radius…
Messier 48 – the NGC 2548 Open Star Cluster
Welcome back to Messier Monday! We continue our tribute to our dear friend, Tammy Plotner, by looking at the open…