SKY · DEEP-SKY · BRAZIL
Deep-Sky Objects Tonight — Rio de Janeiro
Tonight from Rio de Janeiro, the best-placed deep-sky showpiece is Sombrero Galaxy (M104), riding about 79° up in the northern sky. Here's the full list of galaxies, nebulae and clusters worth hunting from Rio de Janeiro tonight — and how dark a sky each one needs.
The Moon is nearly out of the way — dark skies for faint objects.
Best placed over Rio de Janeiro tonight
Ranked by how high each climbs in tonight's dark sky from Rio de Janeiro. The higher an object is, the less atmosphere you look through — and the better it shows.
An edge-on galaxy with a dark dust lane like a hat brim — a small-telescope classic. In Virgo.
A compact, bright autumn globular cluster, easy to find off the Great Square of Pegasus. In Pegasus.
One of the brightest globular clusters, low in the south for northern observers. In Sagittarius.
A dense, rich open cluster shaped like a flight of ducks — lovely in binoculars. In Scutum.
Home of the famous "Pillars of Creation"; the surrounding cluster is an easy binocular sight. In Serpens.
A bright nebula in the heart of the Milky Way — superb in binoculars from a dark southern-sky view. In Sagittarius.
A delicate nebula split by dark dust lanes, near the Lagoon in the rich Sagittarius star fields. In Sagittarius.
A bright, sprawling star cluster low in the southern Milky Way — naked-eye from dark skies. In Scorpius.
A bright planetary nebula, an easy and rewarding binocular and small-scope target. In Vulpecula.
A bright spring globular with half a million stars — a fine binocular and small-scope target. In Canes Venatici.
A large, low-surface-brightness spiral — needs a genuinely dark, Moonless sky, then rewarding in binoculars. In Triangulum.
A swarm of stars filling a binocular field; a faint haze to the naked eye under dark skies. In Cancer.
A tiny, perfect smoke ring — the glowing shell of a dying star; a small-telescope favourite. In Lyra.
The nearest big galaxy — a faint elongated smudge to the naked eye from a dark sky, the most distant thing most people ever see unaided. In Andromeda.
A face-on spiral with a companion — its spiral arms are visible in a modest telescope from a dark site. In Canes Venatici.
The finest globular cluster for northern observers — a fuzzy ball of hundreds of thousands of stars. In Hercules.
A tight, bright knot of blue stars — obvious to the naked eye, dazzling in binoculars. In Taurus.
Out of reach from Rio de Janeiro tonight
These showpieces are either below Rio de Janeiro's horizon during tonight's dark hours, or never rise from this latitude at all — useful to know before you go looking.
Rio de Janeiro right now
Faint galaxies and nebulae need a genuinely dark, cloudless, Moonless sky — a quick check of tonight's cloud cover and the stargazing verdict for Rio de Janeirotells you whether it's worth the trip out of town.
More sky over Rio de Janeiro
SEE IT ON THE MAP
Watch the day/night line over Rio de Janeiro to plan your dark-sky window.