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When you enter into any new area of science, you almost always find
yourself with a baffling new language of technical terms to learn before you can converse with the experts. This is certainly true in astronomy both in terms of terms that refer to the cosmos and terms that describe the tools of the trade, the most prevalent being the telescope. So to get us off of first base, let’s define some of the key terms that pertain to telescopes to help you be able to talk to them more intelligently. The first area of specialization in telescopes has to do with the types of telescopes people use. The three designs of telescopes that most people use are the Refractor, the Reflector and the Schmidt Cassegrain telescope. The refractor telescope uses a convex lens to focus the light on the eyepiece. The reflector telescope has a concave lens which means it bends in. It uses mirrors to focus the image that you eventually see. The Schmidt Cassegrain telescope uses an involved system of mirrors to capture the image you want to see. A binocular telescope uses a set of telescopes mounted and synchronized so your view of the sky is 3-D. Beyond the basic types, other terms refer to parts of the telescope or to the science behind how telescopes work. Collimation is a term for how well tuned the telescope is to give you a good clear image of what you are looking at. You want your telescope to have good collimation so you are not getting a false image of the celestial body. Aperture is a fancy word for how big the lens of your telescope is. But it’s an important word because the aperture of the lens is the key to how powerful your telescope is. Magnification has nothing to do with it, its all in the aperture.
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Director Jon M. Chu missed ‘Wicked’ premiere to welcome fifth child
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“Wicked” director Jon M. Chu couldn’t attend the film’s premiere in Los Angeles, and the reason is quite “wonderful.”
Chu shared on his Instagram Stories that he and his wife Kristin Hodge welcomed their fifth child on Saturday, writing that he “can’t believe this happened while the movie is premiering.”
“Magic is in the air,” he wrote, sharing a photo of Hodge holding their newborn daughter.
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He added a note to his new addition: “Welcome to our world, you’re gonna do great. You have a lot of witches on your side.”
“Wicked” stars singer Ariana Grande and Oscar-nominated actress Cynthia Erivo star as witches Glinda and Elphaba, respectively. The two-part movie is a cinematic adaptation of the famed Broadway musical, which is a prequel to “The Wizard of Oz” and tells an alternate version of events in Oz before Dorothy’s arrival.
Chu may not have been able to physically attend the premiere but his presence was felt.
According to footage from inside the theater posted online, a video of Chu speaking from the hospital was played before the movie began.
“I’ve waited for three years to have this moment to share a movie with you but I’ve waited my whole life to have this moment, to have a fifth child right now,” he said in the video, as the audience was heard collectively “aww-ing” at the sentiment.
With a laugh, Chu added that “of course, this little girl knows when to show up.”
Jonathan Bailey, Bowen Yang, Ethan Slater, Michelle Yeoh and Jeff Goldblum round out the ensemble cast.
Part one of “Wicked” will soar in theaters on November 22. The second film is expected in November 2025.
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