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ARISTARCHUS
ARISTARCHUS
Samos, Grecia (//310 BC - //ca. 230 BC)
Aristarchus was a Greek astronomer and mathematician, born on the island of Samos, in Greece. He was the first person to present an explicit argument for a heliocentric model of the solar system, placing the Sun, not the Earth, at the center of the known universe (hence he is sometimes known as the "Greek Copernicus").
 

Enjoy these insightful and educational video clips drawn from over 70 hours of interviews with the world's leading figures in astronomy, shot during the filming of 400 Years of the Telescope.

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Suvi Gezari

The Golden Age of astronomy
Suvi Gezari - John Hopkins University

In this Golden Age of astronomy, when you’re trying to investigate a problem, you don’t have to just go about it with one telescope or in one wavelength region of light. You can use a whole array of telescopes and really study the problem from many different angles.

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Suvi Gezari

Ground versus space-based telescopes
Suvi Gezari - John Hopkins University

The age of ground based telescopes is not over, even though we have wonderful satellite telescopes that detect x-ray radiation and ultraviolet radiation.

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Suvi Gezari

How I became an astronomer
Suvi Gezari - John Hopkins University

I really got involved in astronomy research in college doing summer research programs and that’s when I really decided that I wanted to do astronomy as a profession.

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Suvi Gezari

Light spectra
Suvi Gezari - John Hopkins University

Light comes in a spectrum of energies and wavelengths.

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Suvi Gezari

Alternative techniques of studying distant black holes
Suvi Gezari - John Hopkins University

So what about all the other super massive black holes that are sitting there? How can we figure out how big they are and how they’re affecting the rest of the galaxy if they’re not producing any radiation from swallowing gas?

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Suvi Gezari

Studying super massive black holes
Suvi Gezari - John Hopkins University

There are super massive black holes lurking in the centers of most galaxies, but we can only really see the signatures of these black holes in a handful of them.

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Suvi Gezari

The telescope and unexpected discoveries in astronomy
Suvi Gezari - John Hopkins University

The greatest discoveries that happen from telescopes are completely unexpected by the entire astronomy community who designed the telescope in the first place.

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Mark Giampapa

My astronomical hero
Mark Giampapa - National Solar Observatory

I’d have to say that my hero in astronomy – though he was not a career astronomer - but he was the writer, Isaac Asimov.

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Mark Giampapa

The Advanced Technology Solar Telescope (ATST)
Mark Giampapa - National Solar Observatory

Solar astronomers believe that many of the mysteries of the formation of magnetic structures on the sun are in these small magnetic elements. And, so we want to build an even larger solar telescope that we call the Advanced Technology Solar Telescope – or simply the ATST.

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Mark Giampapa

Solar astronomy
Mark Giampapa - National Solar Observatory

Solar astronomy, of course, concentrates on a single object, the sun. But then the sun is not entirely unique in the galaxy of stars, though it’s not exactly the most typical star in the galaxy.

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