How Fast Can We Take a Picture of the Entire Sky? - podcast episode cover

How Fast Can We Take a Picture of the Entire Sky?

Dec 08, 20173 min
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Episode description

A new robotic camera is set to change what we know about outer space by capturing huge images of the night sky. Learn more on BrainStuff.

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Transcript

Speaker 1

Welcome to brain Stuff from How Stuff Works, Hey, brain Stuff, Lauren vogelbam here. Our humble vantage point on Earth makes the night sky seem like a somewhat static scene, but in reality, the space around us is ablaze with spectacular phenomena that fairly swarmed the heavens, such as supernova a k a. Exploding stars and comments. Tracking these events is now a little bit easier thanks to the Zwicky Transient Facility a k a. The z t F at the

Palomar Observatory in San Diego. Scientists from the California Institute of Technology and the University of Washington and eight other institutions announced the camera's launching in mid November. And if you're wondering where the snazzy name comes from, the project gets its name from Fritz Zwicky, the first astroiod physicist

to conduct research at cal Tech. During his decades long career, Zwicky spotted about a hundred and twenty supernova in stark contrast, the instrument that bears his name should capture a fresh supernova less than twenty four hours old every single night.

ZTF is a robotic camera that's attached to the Samuel Oskin telescope, which measures forty eight inches or one point two meters and has been scanning the sky since the World War two ERAZTF will operate from early to the end of likely witnessing tens of thousands of transient events like the blooming of distant supernova asteroids and even planets

caught in the inexorable pull of giant black holes. The five hundred and seventy six megapixel camera captures a full forty seven degrees of the northern sky and just a single image that's about seven times as much of the sky's earlier cameras. For reference, the sky all around Earth is about forty thousand square degrees, and the ZTF captures three thousand, seven hundred and fifty square degrees of the

heavens every hour. That means that after three nights of work, the ZTF will have accumulated images of the entire night sky. The system processes those images two and a half times faster than older cameras, meaning researchers can take more pictures, spotting ephemeral events that slower devices would miss. But that's only they have the hard drive space. Each image has a resolution of about twenty four thousand square pixels. The pictures are so big that they can't really be viewed

on a single display. One researcher estimates that you need about seventy two average computer monitors to see one of ztfs full resolution images. Ztfs primary role is to simply capture and identify transient events in the sky. Later, other facilities will help sort through the massive amounts of data, which will also be openly published for the entire astronomy community to view, and there will be even bigger telescopes

to come, like the Large Synoptic Survey Telescope. Today's episode was written by Dathan Chandler and produced by Tristan McNeil. For more in this and lots of other spaced out topics, visit our home planet, how Stuff Works dot com.

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