Solar Eclipse By Holger Krupp

Venus and the Sisters (pleiades)

Image Credit: Fred Espenak (Bifrost Astronomical Observatory) more images: instagram @astronomy.blog

Happy Birthday, Hubble!

The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. Although not the first space telescope, Hubble is one of the largest and most versatile, and is well known as both a vital research tool and a public relations boon for astronomy. The HST is named after the astronomer Edwin Hubble, and is one of NASA’s Great Observatories, along with the Compton Gamma Ray Observatory, the Chandra X-ray Observatory, and the Spitzer Space Telescope.

With a 2.4-meter (7.9 ft) mirror, Hubble’s four main instruments observe in the near ultraviolet, visible, and near infraredspectra. Hubble’s orbit outside the distortion of Earth’s atmosphere allows it to take extremely high-resolution images, with substantially lower background light than ground-based telescopes. Hubble has recorded some of the most detailed visible light images ever, allowing a deep view into space and time. Many Hubble observations have led to breakthroughs in astrophysics, such as accurately determining the rate of expansion of the universe.

sourcet: Wikipedia & Overview

Image credit: NASA/ESA & Hubble

Mammoth Hot Springs Mammoth Hot Springs - Impressed by the rock formations and their colors – white, yellow, gold, and orange! All these colors are due to the presence of bacteria and algae that flourish in the extremely hot waters of the springs. Over thousands of years they have formed terraces called travertine formations - Rain waters seep into the rocks, and once they reach a certain depth, they are heated by the action of boiling magma. They rise back to the surface of the earth. The waters at Mammoth Hot Springs are not expelled into the air. They cross the rocks up and deposit limestone sediments on the surface. The warm waters slowly flow from one basin to another, forming terraces as shown in the picture. It flows over some white limestone and orange travertine deposits. Mammoth Hot Springs is “journey to the center of Earth”, but outdoors!

The total solar eclipse of 02 July 2019 from La Serena, Chile.

Credit: Gwenael Blanck

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Titan, Enceladus, Tethys, Pandora, & Epimetheus. October, 2007.

NASA/JPL-Caltech/SSI/CICLOPS/Kevin M. Gill

Wide-Field Ellipse