Name: I/O '18ガイド - Google Cloud (I/O '18 Guide - Google Cloud)
Uploaded: 2021-01-14T08:02:36.000Z
Duration: 7 min 41 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

with Jen Tong, who is apparently using the power of the cloud

So, Jen, what is going on here at this booth?

JEN TONG: So behind us, we see Project PANOPTES,

which is an open source project that includes open source

astronomers to build these robotic telescopes

TODD KERPELMAN: And so what happens once they

planets around other stars is by combining their efforts using

So what happens is, each night, the telescopes

And they'll get a bunch of great images of the sky.

They're going to start uploading all their data to Cloud

And from there, we can combine all the data together,

we can infer the existence of planets around other stars.

TODD KERPELMAN: And how do you infer the existence of planets?

JEN TONG: So planets are very hard to see directly,

and there's lots of glare, and they're very far away.

In fact, a star only looks like one pixel on the camera.

So we have to use some trickery to do that.

So instead of looking for the planet directly,

when the planet moves between us and the star,

Or we call it a transit in the more general case.

is you've got hundreds of telescopes, all

around the world, taking pictures of the night sky.

They combine all those images up to Google Cloud, which

analyzes them all and looks for a star that

think it must be because there's a planet passing

So we're able to infer that just by having

a whole bunch of samples from having a very large fleet

TODD KERPELMAN: Wow, that's very interesting.

Now, if I remember from being three years old,

How can you tell that a star is dimming because

of a planet passing in front of it versus normal star

And that's a great question, because that's

part of the stuff that makes PANOPTES special.

Because we're using commercial, off-the-shelf cameras instead

that those cameras are designed to take color photos.

Because when a camera takes color photos,

it filters some of the light out using a thing

And when the star twinkles, it moves around that Bayer filter.

And it makes it much harder to count the number of photons.

Because we don't know how much are getting

look for another star, in the same picture,

that has the exact same amount of twinkle.

And from that, we can do a relative brightness

measurement, because we know how bright those stars should be,

And that's how we kind of cancel out the twinkle.

TODD KERPELMAN: And I'm contractually obligated to ask,

what awesome Google Cloud Platform features are you using

JEN TONG: PANOPTES definitely kind of illustrates

that boring uses of the cloud can enable really cool stuff.

We're using some of the simple security controls.

We're putting a service account on each one of the devices,

so we can control access to a specific telescope,

can access a specific part of our storage buckets.

And then we're using Google Cloud Storage

And then we're aggregating it on Google Compute Engine.