There are two leading ways to measure the universe's rate of expansion, and for fifteen years, they more or less agreed with one another. Not anymore, and that’s a big deal.

ScienceCast 255: Hubble’s Contentious Constant

NASA video series covering fun, interesting, and unusual science and research topics from the International Space Station and NASA’s science missions.

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The new solar arrays on @Space_Station, iROSA, are providing power to the station with improved efficiency. ROSA technology will also help power Gateway, and the DART mission!

NASA ScienceCast 313: The Power of the Station's New Solar Arrays

The ISS is a one-of-a-kind laboratory, as well as an incubator for new business, accelerating the development of a new space economy in low-Earth orbit.

NASA ScienceCast 312: Doing Business in Space

Colorful bursts of energy above thunderstorms called transient luminous events can be observed from the ISS. Instruments on the station are helping scientists study these particle outbursts.

NASA ScienceCast 311: Observing Lightning from the International Space Station

The International Space Station is well known as an orbiting laboratory, but during the past decade the station has also served a very different role - that of being a business incubator. One of its star products is the CubeSat.

NASA ScienceCast 310: The Small Satellite That’s Paying Big Dividends

The commercialization of low-Earth orbit is enabling a new market in space, while aiding NASA in its mission of exploration and discovery.

ScienceCast 255: Hubble’s Contentious Constant

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