Theme: Discovering Galaxies

 

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Text, Viewspace. Coming up - Discover a Universe of Beautiful Galaxies. A countdown clock counts down when the show will continue. The clocks starts at 15 seconds and ticks down to 0 seconds. Then the screen turns black. 

 

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 A starry sky above a hill. Red and white light in the sky fades to black in the upper left. 

Text, Like a big city sparkling with lights, our galaxy, the Milky Way, glitters with the light from billions of stars. 

A blue spiral galaxy. 

Text, We live in the outskirts of this immense cosmic city. 

Our star, the Sun, is our "porch light." 

Galaxies in black space. 

Text, Far in the distance are other stellar cities -- other galaxies, each shining with their own huge collection of stars. 

Some galaxies are smaller, like quaint little towns. 

Others sprawl out, each one a cosmic metropolis. 

Glowing galaxies flow by in outer space. 

Text, Everywhere we look, in every direction, these celestial cities go on and on as far as our eyes and telescopes can see. 

There are billions of other galaxies like ours -- each filled with millions, billions, or even trillions of stars -- scattered throughout our incredible universe. A Visualization of numerous galaxies as they fly past us. 

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A picture of a Minotaur is on the top left, a galaxy on the top right.

 

Text, MYTH versus REALITY. Myth, Only large space telescopes like the Hubble Space Telescope can see galaxies outside the Milky Way., Reality, A small backyard telescope can reveal dozens of galaxies in the night sky. Larger telescopes reveal many more. However, you don't even need a telescope to see other galaxies. Binoculars can pick out scores of them in a dark sky. You can even spot three galaxies with nothing but your eyes if you live in the right place: the Andromeda Galaxy and the Large and Small Magellanic Clouds.

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 Title, Discovering Galaxies. The text warps and waves. 

Black space is filled with distant stars and streaks of light. Text, Our universe is full of beautiful, dynamic, wild-looking, and enormous galaxies. A spiraling disk-shaped glowing cloud comes into view. Red and white stars twinkle. Text,, But just a century ago, nobody knew. 

The glowing Milky Way along with billions of stars light up the sky with dark mountains silhouetted in the foreground. Text, Many believed our galaxy, the Milky Way, was all there was, that nothing existed beyond. Yet, there were faint, fuzzy patches in the sky called nebulae, Latin for clouds. 

A rotating dotted circular line is drawn around a white streak far to the left of the Milky Way. Text, Some people wondered whether these nebulae were other galaxies, like our own, located very far away. 

Historic photo, a man looks through and adjusts a giant telescope, Text, In 1923, astronomer Edwin Hubble aimed the world's largest telescope, a newly built 100-inch telescope atop California's Mount Wilson, at the Great Andromeda Nebula. 

A white, glowing cloudy disk comes into view. Text, In it, he found a star that brightened, dimmed, and brightened again over the course of a month. The blinking star is highlighted with a rotating yellow line on the outer edge of the nebula. It was a cosmological jackpot, a Cepheid variable star. 

Historical photo, a woman studies a printed sheet. Text, About a decade earlier, while studying thousands of variable stars, stars that change in brightness, Harvard Observatory's Henrietta Leavitt had discovered a remarkable quality of Cepheid variables. 

Bright Cepheids pulsate slower than dim ones do. A side by side comparison shows a dim Cepheid star next to a bright Cepheid star. The dim star pulsates quickly. The bright star pulsates slowly. 

Text, This solved a problem. 

Like light bulbs, stars have different wattages. A dimmer lightbulb sits next to a brighter lightbulb. 

The brighter bulb moves away into the distance across a grid in perspective until it matches the brightness of the dim bulb in the foreground. Text, When you see a faint star in the night sky, how do you know whether it is truly dim and nearby, or bright but far away? 

A Cepheid star in the Andromeda Nebula blinks slowly on the outer edge. Thanks to Henrietta Leavitt's discovery, Edwin Hubble could figure out how bright the Cepheid in Andromeda Nebula really was by timing how quickly the star changed brightness. Historic photo, Edwin Hubble examines images. 

Text, This Cepheid had a slow pulse, which meant it was a bright star very far away, much too far, Hubble calculated, to belong to our galaxy. 

The Andromeda Nebula had to be another galaxy far beyond our own. 

We move closer to the glowing white center of the Andromeda Nebula. 

Today, we call it the Andromeda Galaxy. 

A bright white galaxy filled with stars is patchy white in the center with sections spiraling out. Text, Edwin Hubble calculated the distance to other nebulae, proving that they too were far-off galaxies. The nebula rotates as we move away from it. 

Another round galaxy made up of millions of stars is brighter in the center. Text, It was suddenly clear, our galaxy is not alone. 

Another spiral galaxy has a solid white section in the middle with less dense stars spinning around the perimeter. Text, With the powerful 100-inch telescope, Edwin Hubble could also see that these newly identified galaxies came in a variety of shapes. 

Some galaxies are wound tight, with spiral arms that wrap closely around their cores. 

The bright galaxy slowly rotates clockwise. 

A galaxy has a small bright center with long filmy arms spiraling out. Text, Other spirals appear more relaxed, with arms spread out. 

A long cigar-shaped galaxy with a bright section on the left side. Text, Some galaxies appear long and thin. 

A galaxy has a bright white oval center with a sprinkling of stars surrounding it that fade out. Text, Others are round or oval-shaped with no arms at all. 

A glowing galaxy has a spatter of bright sections generally box-shaped. Text, There are even some galaxies that have no organized shape, they just look like messy blobs. 

A wishbone-shaped illustration shows the different shapes of galaxies starting with simple circles and ovals and branching into two arms of three variations of spiral shapes. Text, Hubble classified galaxies by their shape into categories that astronomer still use today. 

Edwin Hubble's work changed our view of the universe forever. A gold galaxy is next to a white galaxy 

Text, No longer was the Milky Way the sole galactic member of the universe. 

As we move away, different shaped galaxies appear as circles and streaks in dark space. 

Text, We know now that our galaxy is one of billions. Today, a space telescope named after Hubble continues to reveal that the universe is even more vast and full of galaxies than perhaps Hubble himself could have ever imagined. 

A model of the Hubble telescope floats in space. Space condenses to show millions of stars and galaxies. 

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 Text, GALAXY TYPES. Stunning SPIRALS. 

A series of spinning spiral galaxies, orange, white, red, and yellow. 

A white and red spiral galaxy spins clockwise. 

A white spiral galaxy spins counterclockwise. 

A series of spinning spiral galaxies, blue, pink, white, orange, and yellow. 

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 Top left, a black and white picture of a minotaur. Top right, a color picture of a galaxy. 

Text, MYTH versus REALITY 

Myth side 

Text, All galaxies are the same. 

Reality side 

Text, The shapes of galaxies vary -- some are spiral, some are elliptical, and some have no definite shape. Galaxies also differ in color, composition, orientation, age, size, the number of stars within them, and distance from Earth. 

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 Text, GALAXY TYPES. ENORMOUS Ellipticals 

A bright yellow elliptical galaxy slowly spins. 

A bright pink and white elliptical galaxy slowly spins. 

A bright white elliptical galaxy slowly spins. 

A bright cream colored elliptical galaxy slowly spins. 

A bright peach elliptical galaxy slowly spins. 

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 Rotating planet with atmosphere, galaxies in space as backdrop. Text, at a Glance. Three types of galaxies. 

Image, a swirl of stars twists in space. 

Text, This is a spiral galaxy, with arms that curl around the galaxy's core. 

Many spiral galaxies resemble pinwheels, but they can look different if seen from a different angle. 

Our galaxy, the Milky Way, is a spiral much like this one. 

This oval-shaped haze of stars is an elliptical galaxy. 

Often round or egg-shaped ellipticals usually appear smooth and featureless. 

The universe's largest galaxies are ellipticals, but ellipticals can be small as well. 

This mess of stars is known as an irregular galaxy. 

Irregular galaxies have no defined shape or structure. 

They are typically smaller than other galaxies. All three images of galaxies spin. 

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 Text, Galaxy types. Intriguing irregulars. 

A galaxy with faint gold stars and bright purple spheres of light intermixed with a pale orange swirling clouds. 

Another galaxy features numerous large bright yellow and orange stairs with hundreds of smaller red, blue and purplish stars in the distance. 

Another galaxy with large purple spheres and a pale lavender and teal haze around the central cluster of stars. A large star shines orange below it. 

A fairly dark galaxy with large orange stars on the perimeter and sparse blue stars in the center. 

A galaxy consisting of dense clusters of purple stars with a gray haze. 

A galaxy with pink stars and a three dimensional dark red cloud structure. 

A galaxy lit from within with bright white stars surrounded by sparse red clouds. 

A galaxy with distanced white stars enveloped in a blue haze with sparse maroon clouds.