Category Archives: Astronomia

Keplero e l’astrologia

By | 25 giugno 2018

L’ atteggiamento di Keplero verso l’astrologia era ben lontano dalla fiducia che la maggior parte dei suoi contemporanei aveva in essa. Egli stava già chiamandola la « piccola flglia folle » della rispettabile astronomia. In seguito scrisse di non voler «nutrite la superstizione dei babbei». – L’uomo Dal Naso D’oro, Kitty Ferguson, Longanesi & C.… Read More »

Milky Way vs Airglow Australis

By | 17 maggio 2018

Captured last week after sunset on a Chilean autumn night, an exceptional airglow floods this allsky view from Las Campanas Observatory. The airglow was so intense it diminished parts of the Milky Way as it arced horizon to horizon above the high Atacama desert. Originating at an altitude similar to aurorae, the luminous airglow is… Read More »

Rotation of the Large Magellanic Cloud

By | 16 maggio 2018

This image is not blurry. It shows in clear detail that the largest satellite galaxy to our Milky Way, the Large Cloud of Magellan (LMC), rotates. First determined with Hubble, the rotation of the LMC is presented here with fine data from the Sun-orbiting Gaia satellite. Gaia measures the positions of stars so accurately that… Read More »

Sakurajima Volcano with Lightning

By | 13 maggio 2018

Why does a volcanic eruption sometimes create lightning? Pictured above, the Sakurajima volcano in southern Japan was caught erupting in 2013 January. Magma bubbles so hot they glowed shot away as liquid rock burst through the Earth’s surface from below. The featured image is particularly notable, however, for the lightning bolts caught near the volcano’s… Read More »

NGC 1360: The Robin s Egg Nebula

By | 11 maggio 2018

This pretty cosmic cloud lies some 1,500 light-years away, it shape and color reminiscent of a blue robin’s egg. It spans about 3 light-years, nested securely within the boundaries of the southern constellation Fornax. Recognized as a planetary nebula it doesn’t represent a beginning though, but instead corresponds to a brief and final phase in… Read More »