Astronomy Basics
Astronomy is the study of everything in the Universe beyond Earth's atmosphere. That includes objects we can see with our naked eyes, like the Moon, planets, and stars. It also includes objects we can only see with telescopes or binoculars, like distant galaxies and nebulae. But it doesn’t take much skill or equipment to get started with stargazing or amateur astronomy, and you can do it almost anywhere. Here you'll learn all the essential things about astronomy that will help you to pave the way into the world of stargazing.
Planetary Opposition 2025: Best Time to See Planets
The best time to view most planets is at the astronomical opposition. Find out what it means and when to see the upcoming oppositions.
Retrograde motion explained: what is retrograde motion in astronomy
Discover the science of retrograde planets! Understand the mechanics of retrograde motion, its causes, and its significance in the study of astronomy and planetary behavior.
What Is Elongation in Astronomy: Mercury & Venus Greatest Elongation 2025 Dates
What is elongation, and what does it have to do with the planets’ visibility in the sky? Get familiar with the concept of elongation and learn how to choose the perfect time to observe the planets!
Vernal Equinox 2025: What Day Is Spring in 2025?
When does spring begin? 🌸 Why aren’t day and night truly equal on the vernal equinox? And why doesn’t it always fall on the same date? 🌍 Find out here!
Fall Equinox 2025: When Is the First Day of Fall?
In 2025, the autumnal equinox will occur on September 22 in the Northern Hemisphere. Learn what makes this day special!
Equinox 2025: What Is an Equinox?
The equinox is here! Discover what makes this day special, why day and night are nearly equal at the equinox, and when the next one will occur.
Planetary Alignments Explained: The Next 6-Planet Parade is on February 28, 2026
The next planetary alignment will take place in February 2026. Six planets — Jupiter, Uranus, Saturn, Neptune, Venus, and Mercury — will align in the evening sky. Find out how to see this unique event!
Measuring Distances In The Sky
Ever wondered what it means when a planet is “5 degrees away” from the Moon? This infographic breaks down how we measure distances in the sky.
12 Zodiac Signs vs. 13 Constellations of Ecliptic
Discover how the 12-sign astrological zodiac concept lines up with today's 13 ecliptic constellations — and why Ophiuchus was dropped. Check out our infographic now!
Solstice: When is it, and what causes it?
The summer solstice 2025 takes place on June 21. What happens on the solstice? Here’s what you need to know.