Located in Gardiner, Montana, the Roosevelt Arch is at the north entrance to Yellowstone National Park. The US Army at Fort Yellowstone oversaw its construction. Theodore Roosevelt laid down its cornerstone in 1903.
This animation consists of 365 images of our sun, captured by ESA’s PROBA-2 satellite in 2018. See a montage showing the sun from day to day, and read more.
A glorious sight on what for many was a very cold morning - late January and early February - 2019. The brightest planets Venus and Jupiter near the moon!
For many of us in the Northern Hemisphere, it's cold! Here's a predawn sky - from Alberta, Canada, earlier this week - at least partly created by cold.