References
Latest References

Space calendar 2025: Rocket launches, skywatching events, missions & more!
By Space.com last updated
Reference Keep up with all the rocket launches, astronomical events and mission milestones for 2025 with our space calendar.

Telescopes on Amazon: The best deals 2025
By Ruth Gaukrodger last updated
Telescopes on Amazon are in abundance, so we've scoped out the best deals that are available.

Telescope deals 2025: save hundreds with these stargazing bargains
By Jase Parnell-Brookes last updated
Deals We've scoped out the best telescope deals available this year featuring top models from reputable retailers.

Special relativity explained: Einstein's mind-bending theory of space, time and light
By Vicky Stein, Daisy Dobrijevic last updated
Einstein's paper on special relativity revolutionized light, light speed, matter and energy with a deceptively simple equation.

What is the moon phase today? Lunar phases 2025
By Tariq Malik, Daisy Dobrijevic last updated
Reference See what moon phase it is tonight and find out when you can see the rest of the moon phases for 2025.

Best budget telescopes under $500 2025: Explore the night sky for less
By Jase Parnell-Brookes last updated
Deals We've rounded up the best budget telescopes under $500 so you can survey the night sky regardless of your budget.

Best telescopes for seeing planets in 2025
By Tom Kerss last updated
Buying Guide The best telescopes for seeing planets give you the best views of our celestial neighbors.

Best stargazing apps 2025: AR apps and virtual star maps to help you navigate the night sky
By Jase Parnell-Brookes last updated
Buying Guide Looking for the best stargazing apps to learn about the night sky? We've rounded up our favorites right here.
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