This recent image from astrophotographer John Chumack shows the Earth’s natural rotation in just 30 minutes of exposure time. Polaris, the North Star, is the stationary point over a Sequoia tree in Warrenton, Virginia, USA. “The rotational speed of the Earth at the equator is about 1,038 miles per hour,” John writes. “At mid-latitudes, the speed of the Earth’s rotation decreases to 700 – 900 miles per hour. You can notice star trails “rotation” in your photographs even in as little as 1 minute exposures. I notice star trailing in about 30 seconds with a 17mm wide angle lens. But the longer you leave the shutter open the more trailing and the more dramatic the effect!”
John used a Canon Rebel Xsi, ISO 400, .17mm Lens at F4.
See more of his work at his website, Galactic Images.
Want to get your astrophoto featured on Universe Today? Join our Flickr group or send us your images by email (this means you’re giving us permission to post them). Please explain what’s in the picture, when you took it, the equipment you used, etc.
In a few years, as part of the Artemis Program, NASA will send the "first…
China has a fabulously rich history when it comes to space travel and was among…
It was 1969 that humans first set foot on the Moon. Back then, the Apollo…
The discovery of the accelerated expansion of the Universe has often been attributed to the…
Freeman Dyson proposed that advanced civilizations might eventually harvest all the energy coming from their…
Is there something strange and alien confined deep inside the Earth? Is it trying to…