◦ The Celestial Archive

APRIL

2011

Browse every NASA Astronomy Picture of the Day entry published in April 2011.

APR 2011Archive Navigation

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Valles Marineris: The Grand Canyon of Mars

Time-Lapse Auroras Over Norway

Kepler's Suns and Planets

NGC 5584: Expanding the Universe

MESSENGER at Mercury

It's Raining on Titan

It's Raining on Titan

Endeavour Looking Up

Endeavour Looking Up

Giant Galaxy NGC 6872

Giant Galaxy NGC 6872

Verona Rupes: Tallest Known Cliff in the Solar System

Verona Rupes: Tallest Known Cliff in the Solar System

The Milky Way Over Tenerife

The Milky Way Over Tenerife

M74: The Perfect Spiral

M74: The Perfect Spiral

Planetary Nebula NGC 2438

Planetary Nebula NGC 2438

Echoes from the Depths of a Red Giant Star

Echoes from the Depths of a Red Giant Star

Lunar Farside

Sunspot Loops in Ultraviolet

Sunspot Loops in Ultraviolet

Otherworldly Planet Rise

Otherworldly Planet Rise

50 Years Ago: Yuri's Planet

50 Years Ago: Yuri's Planet

Centaurus Radio Jets Rising

Centaurus Radio Jets Rising

Young Stars in the Rho Ophiuchi Cloud

Young Stars in the Rho Ophiuchi Cloud

Messier 101

The Tadpoles of IC 410

The Tadpoles of IC 410

View from Everest

View from Everest

Visual Effects: Wonders of the Universe

Visual Effects: Wonders of the Universe

The GRB 110328A Symphony

The GRB 110328A Symphony

Rio Morning Moonset

Rio Morning Moonset

Peculiar Galaxies of Arp 273

Peculiar Galaxies of Arp 273

Virgo Cluster Galaxies

Virgo Cluster Galaxies

Shadows at the Lunar South Pole

Shadows at the Lunar South Pole

The Cat's Eye Nebula from Hubble

The Cat's Eye Nebula from Hubble

Monsters of IC 1396

Monsters of IC 1396

Hydrogen in the LMC

Hydrogen in the LMC

The Dark Tower in Scorpius

The Dark Tower in Scorpius

Scintillating

The Antennae

Tycho's Supernova Remnant

Tycho's Supernova Remnant

30 APODs this month31 Aprils since Jun 1995◦ Archive spans 31 years