Moon Occults Venus

It may look like Earthrise, but it’s actually Venus-set. Just after sunrise two days ago, both the Moon and Venus also rose. But then the Moon overtook Venus. In the featured image sequence centered on the Moon, Venus is shown...

/ June 21, 2020

Northern Summer on Titan

Today’s solstice brings summer to planet Earth’s northern hemisphere. But the northern summer solstice arrived for ringed planet Saturn over three years ago on May 24, 2017. Orbiting the gas giant, Saturn’s moon Titan experiences the Saturnian seasons. Larger than...

/ June 20, 2020

The Veins of Heaven

Transfusing sunlight through a darkened sky, this beautiful display of noctilucent clouds was captured earlier this week, reflected in calm waters from Nykobing Mors, Denmark. From the edge of space, about 80 kilometers above Earth’s surface, the icy clouds themselves...

/ June 19, 2020

The Veins of Heaven

Transfusing sunlight through a darkened sky, this beautiful display of noctilucent clouds was captured earlier this week, reflected in calm waters from Nykobing Mors, Denmark. From the edge of space, about 80 kilometers above Earth’s surface, the icy clouds themselves...

/ June 19, 2020

The Tadpoles of IC 410

This telescopic close-up shows off the central regions of otherwise faint emission nebula IC 410, captured under backyard suburban skies with narrowband filters. It also features two remarkable inhabitants of the cosmic pond of gas and dust. Below and right...

/ June 18, 2020

Magnetic Streamlines of the Milky Way

What role do magnetic fields play in interstellar physics? Analyses of observations by ESA’s Planck satellite of emission by small magnetically-aligned dust grains reveal previously unknown magnetic field structures in our Milky Way Galaxy — as shown by the curvy...

/ June 17, 2020

APOD is 25 Years Old Today

Welcome to the quadranscentennial year of the Astronomy Picture of the Day. Perhaps a source of consistency for some, APOD is still here. To help celebrate APOD’s Silver Anniversary, some of APOD’s TVAoTaSMD have recorded a birthday greeting and thanks...

/ June 17, 2020

Orion over Argentine Mountains

Do you recognize the constellation of Orion? It may be harder than usual in today’s featured image because the camera has zoomed in on the center, and the exposure is long enough to enhance nebulas beyond what the unaided human...

/ June 9, 2020

Atmospheric Ring of Venus

Why is Venus surrounded by a bright ring? Sometimes called a ring of fire, this rare ring is caused by the Sun’s light being visible all around an object. Usually seen around the Moon during an annular solar eclipse, the...

/ June 8, 2020

Halo of the Cats Eye

The Cat’s Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky. Its haunting symmetries are seen in the very central region of this stunning false-color picture, processed to reveal the enormous but extremely faint...

/ June 7, 2020