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Image 118 – What’s in an image? Sometimes quite a lot, more than meets the eye. I’m posting an image every day or so.
This photo is of the northern end of Gloucester Street, seen from the eastern side of the River Churn, close to Abbey Way Services.
You’ll notice several sources of light. Light travels at a little over 1 billion km/h, 1.079 billion if you want to be a little more precise. Like anything in motion at a steady speed, you can express distances in terms of travel time. If I fly a helicopter in a straight line to London at 100 km/h and it takes me an hour, then the distance to London must have been 100 km. If it takes only 30 minutes, then the distance was 50 km. You get the idea.
The streetlight, the house and the car are all around 20 m away (or 0.020 km), and doing the arithmetic shows that light would take around 80 billionths of a sec to make that trip.
The Moon hangs in the sky to the right of the house, and it’s 390 million km away, so light takes 1.3 seconds or so to arrive from the Moon.
The planet Venus is visible near the top of the photo, and as I write Venus is about 111 million km away, a distance that light covers in just over 6 minutes.
For comparison, our nearest neighbouring star, Proxima Centauri, is so far away, that its light takes 4¼ years to reach us. Space is BIG!
When: 2nd January 2025
Where: Gloucester Street, Cirencester
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Cirencester
For convenience, here’s a list of all the Cirencester area images:
A417 roadworks, Advent Market, Bishops Walk, Baunton, Canal 1, 2, Castle Street, Christmas lights 1, 2, Church 1, 2, 3, 4, 5, 6, Churn flood, Countryside, Fallen tree, Fleece, Gasworks, Gloucester Street, Hare 1, 2, Hospital, Market Place 1, Phoenix Fest, Riverside Walk, Stone plaque, Stratton Meadow, Tank traps, View, Wonky 1, 2, Yellow Iris
Themed image collections
The links below will take you to the first post in each collection
Cirencester, Favourites, Irish holiday 2024, Roman villa
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