About this episode
This episode discusses the Moon's position relative to the star Aldebaran and the star clusters Hyades and Pleiades, exploring their distances and appearances.
The Moon passes through the bull tonight. The bull’s “eye” – the star Aldebaran – is off to the left of the Moon. The bull’s face and shoulder are even closer, represented by a pair of star clusters – the Hyades and the Pleiades. For the most part, you can’t tell the distance to an astronomical object just by its appearance. Something that looks quite bright might be close, but it might also be far away and especially bright. But you can tell something about the distances to the objects around the Moon tonight by their appearance. The Pleiades looks like a tiny dipper close below the Moon. It contains hundreds of young stars, some of which are hot and bright. But the cluster’s small size is a good indication of its distance – almost 450 light-years. The Hyades looks bigger. It forms a letter V that outlines the bull’s face. It looks a good bit more spread out than the Pleiades. But that’s largely because it’s only a third as distant. Aldebaran stands at the top left point of the V. It outshines all the other points. In part, that’s because it’s less than half as far – just 65…
People in this episode
Host: Damond Benningfield
Topics covered
- Moon
- Aldebaran
- Hyades
- Pleiades
- Venus
- astronomy
- distances
Keywords
- astronomical objects
- star clusters
- light-years
Mentioned in this episode
Places: Moon, Pleiades, Hyades, Venus
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