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M. C. Escher Prints and Drawings

Maurits Cornelis Escher (1898-1972), better known as M. C. Escher, was a Dutch draftsman and printmaker born in Leeuwarden, The Netherlands. Boston Public Library’s collection shows the broad range of Escher’s talent as a printmaker. Now their collection of prints by M.C. Escher is open to the public in the form of high quality digital files available for exploration on their website.

wonders-of-the-cosmos

Asteroid belt

The asteroid belt is the circumstellar disc in the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets. The asteroid belt is also termed the main asteroid belt or main belt to distinguish it from other asteroid populations in the Solar System such as near-Earth asteroids and trojan asteroids. About half the mass of the belt is contained in the four largest asteroids: Ceres, Vesta, Pallas, and Hygiea. The total mass of the asteroid belt is approximately 4% that of the Moon, or 22% that of Pluto, and roughly twice that of Pluto’s moon Charon (whose diameter is 1200 km).

The asteroid belt formed from the primordial solar nebula as a group of planetesimals. Planetesimals are the smaller precursors of the protoplanets. Between Mars and Jupiter, however, gravitational perturbations from Jupiter imbued the protoplanets with too much orbital energy for them to accrete into a planet.

source | images: NASA, SOFIA/Lynette Cook, ESO/M. Kornmesser

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glitchphotography

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midnight-charm

House of Dior, John Galliano. Evening Ensemble, Autumn/Winter 2005–6 Haute Couture (White silk tulle, embroidered white silk, and metal thread)

Photography by Corey Tenold

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Art G.Shvecova (Design graphics - Purple Gold Earth_220418)

wonders-of-the-cosmos

Massive Stars in Open Cluster Pismis 24

How massive can a normal star be? Estimates made from distance, brightness and standard solar models had given one star in the open cluster Pismis 24 over 200 times the mass of our Sun, making it a record holder. This star is the brightest object located just above the gas front in the above image. Close inspection of images taken recently with the Hubble Space Telescope, however, have shown that Pismis 24-1 derives its brilliant luminosity not from a single star but from three at least. Component stars would still remain near 100 solar masses, making them among the more massive stars currently on record. Toward the bottom of the image, stars are still forming in the associated emission nebula NGC 6357, including several that appear to be breaking out and illuminating a spectacular cocoon.

Credit: NASA, ESA and J. M. Apellániz (IAA, Spain)