#434: Gravity, Energy, and Hidden Galaxies: Listener Queries Unpacked

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Space Nuts Q&A: Gravity Without Mass, Energy and Gravity, and Early GalaxiesJoin Andrew Dunkley and Professor Fred Watson in this engaging Q&A episode of Space Nuts, where they tackle intriguing questions from our listeners about gravity, energy, and the movement of galaxies.

Episode Highlights:

- Gravity Without Mass? Steve from New Zealand asks if gravity can exist without mass. Fred dives into the complexities of this question, exploring the relationship between energy and mass, and whether this could offer an alternative explanation for dark matter.

- - Energy and Gravity: Gus from Issaquah, Washington, ponders whether energy creates gravity and if a gravitational field itself generates energy and mass. Fred discusses the potential implications and the concept of gravitational energy.

- - Early Galaxies Moving Towards Us: Nick from Auckland, New Zealand, wonders if early galaxies could be moving towards us, currently out of reach. Fred explains the mechanics of galaxy movements and the Doppler effect, shedding light on whether such galaxies could be hidden from view.

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