Guest Thinkers — February 16, 2011

Videos from Barry Bachenheimer

Scott McLeod

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Courtesy of Clay Burell, here are three great videos from Barry Bachenheimer:

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I’ve added all three to the Moving Forward wiki!

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Infographic illustrating three steps to measure the Hubble Constant, showing Cepheid variable stars, supernovae, and galaxies at increasing distances with redshifted light—highlighting how these methods reveal that the hubble tension is real.

Starts With A Bang

Ask Ethan: Is the Hubble tension a real problem?

Is the Universe’s expansion rate 67 km/s/Mpc, 73 km/s/Mpc, or somewhere in between? The Hubble tension is real and not so easy to resolve.

A collage featuring a subway train, a person in elaborate costume, stylized crows, and the text "The Nightcrawler" on a dark grid background explores the myth of leadership in an urban landscape.

Business

The myth of leadership

Welcome to The Nightcrawler — a weekly newsletter from Eric Markowitz covering tech, innovation, and long-term thinking.

A composite image showing a galaxy with red circles marking stars on the left and multicolored expanding rings with Earth on the right, all set against a grid background, illustrating concepts like Hubble tension studied by Wendy Freedman.

Starts With A Bang

Is the Hubble tension real? Exclusive interview with Wendy Freedman

Different methods of measuring the Universe’s expansion rate yield high-precision, incompatible answers. But is the problem robustly real?

Circular astronomical image showing constellations and celestial objects labeled against a dark sky, reminiscent of a NASA PUNCH video sun corona visualization, with a timestamp of 2025-06-03 01:52 at the bottom left.

Starts With A Bang

Video: NASA’s PUNCH mission sees the Sun’s corona in action

Launched in March, the PUNCH mission has viewed two incredible coronal mass ejections, tracking them farther from the Sun than ever before.

A flowchart with a large question mark at the top leads to boxes containing photos, abstract patterns, and arrows connecting each step on a textured green background.

Smart Skills

When to quit: A simple framework for life’s toughest decisions

Annie Duke, a poker champion turned decision scientist, talks with Big Think about how to choose well under uncertainty.

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