Jean-Dominique Cassini aka Giovanni Domenico Cassini (1625-1712). An Italian astronomer who became director of the Paris Observatory and a naturalized Frenchman. For his early observations of Saturn's rings and moons NASA named its Cassini mission to Saturn in his honor. Cassini is still taking fabulous pictures of the Saturnian system. (Portrait: Leopold Durangel) ©Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Rings of Saturn from Cassini.

Saturn From Cassini. Credit: Cassini, Judy Schmidt, NASA

Caroline Lucretia Herschel (16 de marzo de 1750 – 9 de enero de 1848) Fue una astrónoma inglesa de origen alemán.. Trabajó con su hermano Sir William Herschel ayudándole tanto en la elaboración de sus telescopios como en sus observaciones. Descubrió ocho cometas entre los que destaca el correo (periódico) Herschel-Rigollet, que lleva su nombre pues lo descubrió el 21 de diciembre de 1788.

Saturn's moon Iapetus. Discovered by Giovanni Cassini in 1671. It looks as if the moon is in shadow on the right hand side, but that is actually the dividing line between a bright hemisphere and one which is as dark as coal. (Photo: Images by Cassini probe 2004-12-31, Mosaic by Matt McIrvin) ©Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

Saturn’s moon Iapetus photographed by the Cassini spacecraft. The right side is overexposed because it’s illuminated by the Sun. The left side glows by light reflecting off Saturn’s clouds. Since sunlight is much fainter at Saturn’s distance than at Earth’s, Cassini had to make a long time exposure to capture this image. (Credit: NASA) Mona Evans, "Earthshine" http://www.bellaonline.com/articles/art301287.asp

NASA's Cassini spacecraft has been studying Saturn and its moons since it entered orbit in 2004. This image, taken on Oct. 5, 2008, is a stunning mosaic of the geologically active Enceladus after a Cassini flyby.

Cassini view of Saturn's rings (2012). The F ring is the outer one, the inner one is the broad A ring. In the Encke gap of the A ring, you can see the shepherd moon Pan. (Image credit: NASA / JPL / Space Science Institute) ©Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

▶ Rhea Transits Saturn - YouTube (Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA) The slim crescent of the moon Rhea transits a crescent Saturn. In an interplay of contrast and shadow, the moon goes dark against the planet, and then its crescent suddenly brightens as it slips in front of Saturn's night side. The view is edge-on to the rings, which you can see as a dark line. Mona Evans, “Rhea Moon of Saturn” http://www.bellaonline.com/articles/art56119.asp

GLIMPSE360

Saturn's moon Iapetus. Comparison of the two hemispheres. The dark terrain is called Cassini Regio after Jean Dominique Cassini. It's fairly smooth, showing that new material is being deposited which covers old cratering. (Credit: JPL NASA) Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

In this image from NASA’s Cassini spacecraft, Saturn‘s rings obscure part of Titan‘s colorful visage.

Titan and Dione as seen by Cassini. (Credit: NASA/JPL/Space Science Institute) Mona Evans, "10 Amazing Facts about Saturn's Moons" http://www.bellaonline.com/articles/art28136.asp

On July 19, NASA's Cassini spacecraft captured a rare image of Saturn's rings and our planet Earth and its moon.

Lakes Through the Haze (NASA Cassini Saturn Mission Image) Using a special spectral filter, the high-resolution camera aboard NASA's Cassini spacecraft was able to peer through the hazy atmosphere of Saturn's moon Titan.

Cassini-Huygens Mission To Saturn - 15th Anniversary Timeline I love this sort of illustration… you can just get lost in it. Wonderful.

Ringside with Rhea Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: Orbiting in the plane of Saturns rings, Saturnian moons have a perpetual ringside view of the gas giant planet. Of course, while passing near the ring plane the Cassini spacecraft also shares their stunning perspective.

Three views of Saturn in August. From top to bottom: 1979 (Pioneer 11), 1981 (Voyager 2), 2009 (Cassini). http://1.usa.gov/1qNSfey

Christoph Scheiner fue un físico y astrónomo jesuita alemán, inventor del pantógrafo dispositivo con el cual es posible dibujar un objeto a escala. También comenzó la construcción de telescopios y empezó a realizar observaciones solares. Al principio colocó lentes coloreadas, pero después comenzó a usar la técnica de proyección. Descubrió las manchas solares, un fenómeno que contrariaba la idea de la perfección del Sol y, por este motivo evitó su publicación. Creó el primer telescopio terres...

On July 3, 1969, the biggest explosion in the history of rocketry occurred when the Soviet N-1 rocket exploded and subsequently destroyed its launchpad. After four unsuccessful launch tries of the Soviet counterpart to the NASA Saturn V rocket the Russian Moon program was cancelled in May 1974.

Titan, Saturn's Largest Moon, Explained (Infographic) oak.ctx.ly/r/1jt1g pic.twitter.com/dGgUBGiuHa