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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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Cute baby animals bring visitors to zoos and aquariums. What happens when they grow up?
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One of the best things that can happen to a zoo or aquarium is for one of their resident animals to go viral.
Just look at the multi-hour-long lines to see Moo Deng, a pygmy hippo in Thailand who has become an internet sensation following her July 2024 birth. The sassy animal is now a full-on brand, with Khao Kheow Open Zoo selling Moo Deng merchandise and even releasing a single “by” the hippo in multiple languages.
Meanwhile, Pesto — a baby king penguin who was eating more fish than his parents by the time he was a few weeks old — is also an online celebrity, with human stars like Olivia Rodrigo and Katy Perry stopping by to meet him.
But what happens when these cute animals become, well, less cute? The Sea Life Melbourne aquarium has already been planning for the next phase of Pesto’s life — and answering questions from the public about his changing appearance.
It’s normal for king penguins to lose their feathers by the time they’re about a year old and become confident swimmers. As a result, a spokesperson for the aquarium says, guests have started asking why Pesto looks different — or why they can’t find him at all.
“We are getting a few guests thinking we have moved him off display completely,” says the spokesperson. “Most of the team’s time is spent pointing him out to guests because he looks so different now.”
The bottom line is that cute baby animals make money.
Admission tickets are only the beginning. Many zoos and aquariums offer special “behind the scenes” or “zookeeper for a day” packages at much higher prices. At Sea Life Melbourne, standard entry tickets for adults start at $51, while the Penguin Passport — which include a 45-minute tour of the birds’ area and a look at how their food is prepared — is $199.
The real jackpot, though, is merchandise. Stuffed animals, T-shirts, fridge magnets, keychains, kids’ books and other branded products are a major way for zoos and aquariums to make money.
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