References
Latest References
![illustration of a blazar shows a bright jet of light in the very center of a scene of swirling orange, gray and purple bands.](https://cdn.mos.cms.futurecdn.net/SEGKuGNyACVtPfhDtGeqjc-320-80.jpg)
What are blazars?
By Elizabeth Fernandez published
Reference Discover the fascinating world of blazars: their discovery, formation, and the science behind these energetic cosmic phenomena.
![a radio galaxy with dark wispy structures expanding out from the center with a bright yellow light at the heart.](https://cdn.mos.cms.futurecdn.net/pEyP7SwknzEFAggoS3tyDm-320-80.jpg)
What are radio galaxies?
By Robert Lea last updated
Reference A radio galaxy is a type of galaxy with giant regions of radio emissions that reach far beyond its visible structure. We explore them in more detail here.
![Person holding one of the best tripods using the rubber grip on the legs](https://cdn.mos.cms.futurecdn.net/736mh9Z4PUYtAKsEWDegsa-320-80.jpg)
Best tripods 2024: For astrophotography, landscapes, travel, video and more
By Kimberley Lane last updated
Buying Guide Our picks of the best tripods will serve you well, no matter what type of photography you're into.
![new moon illustration shows a very dimly lit moon against a black background.](https://cdn.mos.cms.futurecdn.net/dztGyajUjgmDjYYWa6YhFL-320-80.jpg)
New moon calendar 2024: When is the next new moon?
By Daisy Dobrijevic last updated
Reference Discover what a new moon is and when the next new moon will occur with our new moon 2024 guide.
![Image shows a woman using one of the best monocular devices](https://cdn.mos.cms.futurecdn.net/yXEE2qUs3gLAyTv5f4VecQ-320-80.jpg)
Best monocular 2024: Spy top models on the market
By Jamie Carter last updated
Buying Guide The best monocular provides a handy, more portable alternative to binoculars or telescopes for wildlife-watching or stargazing — here are our favorite models.
![How many people have walked on the moon? Astronaut Buzz Aldrin walking on the moon surrounded by scientific equipment during the Apollo 11 mission](https://cdn.mos.cms.futurecdn.net/6VPFRwwgVp7WWJiTnjMY9J-320-80.jpg)
How many people have walked on the moon?
By Mark Smith last updated
Reference Only a handful of people have ever set foot on the moon. We take a look at this super exclusive club, who they were, and what enabled them to make that incredible journey.
![Area 51 sign on fence in the Nevada Desert. The white square sign has the text "entering area 51" written in large black letters.](https://cdn.mos.cms.futurecdn.net/7ya4qrHsoArDh8nFxzB87U-320-80.jpg)
Area 51: What is it and what goes on there?
By Robert Lea last updated
Reference Area 51 is a U.S. military base that has become synonymous with tales of UFOs, government cover-ups and potentially testing alien technology.
![two people fighting with lightsabers, there is one green and one red lightsaber.](https://cdn.mos.cms.futurecdn.net/iGMaeCD4jmxT48ceCS5yMB-320-80.jpg)
Star Wars movies in order: Chronological and release
By Lauren O'Callaghan last updated
Reference Watch all the Star Wars movies in order and prove you’re strong with the Force.
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