Tag Archives: Physics

Podcast #29: Stellar evolution – from gas to star

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Welcome to episode 29 of the Urban Astronomer podcast.  As you know by now, we mainly feature interviews with people connected to South African astronomy. But since we had no guests lined up for this episode, we decided it was time to keep a promise we’d made a month ago to listener Andrew Botteril, from KwaZulu-Natal province in South Africa. Andrew is a fan of the show and had asked that we feature a little more basic science, explaining some … Continue reading →

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What is the temperature of Space?

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Dear Urban Astronomer So, my good friend and I were talking about the temperature in space. He thinks it must be hot in space, since there is no atmosphere to absorb sunlight. I disagreed. I think that the fact that there is no air in space, means there is nothing to heat up. That’s how temperature on earth works. So, surely it must be cold in space. Can you shed light (excuse the pun) on this debate? Can you answer … Continue reading →