Search Results for: Andromeda

Andromeda galaxy, closest large spiral

The Andromeda galaxy is the closest big galaxy to our Milky Way. At 2.5 million light-years, it’s the most distant thing you can see with the eye alone. The moon is waning. It’s the right time of year. Time to start looking! 

Wide, symmetrical image of Milky Way arcing above a river.

Andromeda, Jupiter, Milky Way over Montana

We’re now in the middle of the best time of year to see Jupiter, and it’s near the starry arc of the Milky Way. Enjoy this panoramic image from John Ashley in Montana.

Andromeda galaxy via robotic telescope

James Figge of Delmar, New York captured this image on February 23, 2019 – from the comfort of his home – with the Harvard-Smithsonian 6-inch robotic telescope in Arizona.

When will the Milky Way and Andromeda galaxies collide?

The Andromeda galaxy is the nearest large spiral to our Milky Way. Astronomers have suspected for some time it will eventually collide with our Milky Way. Now – thanks to the Gaia satellite – they know more.

Star-hop: Pegasus to Andromeda galaxy

The 4 stars of the Great Square of Pegasus are easy to find. Ready? Let’s star-hop!

Cassiopeia to Andromeda galaxy

One half of the W of Cassiopeia is more deeply notched than the other half. This deeper V is your “arrow” in the sky, pointing to the Andromeda galaxy.

Use Cassiopeia to find Andromeda galaxy

Many use the constellation Cassiopedia – which is easy to find, shaped like an M or W – as a jumping off point for locating the near-nearest large galaxy to our Milky Way.

Supermassive black holes photobomb Andromeda galaxy

Astronomers thought J0045+41 was 2 orbiting stars, part of the nearby Andromeda galaxy. New work shows it’s 1,000 times more distant, possibly the most tightly coupled pair of supermassive black holes yet seen.

Use Pegasus to find Andromeda galaxy

The wonderful Andromeda galaxy! Most distant object we can see with the eye alone. Try using the Great Square of Pegasus to find it in a dark sky.

Andromeda galaxy in high-energy X-rays

A space mission turned its X-ray vision on the Andromeda galaxy and spotted 40 X-ray binaries, exotic objects thought to play a role in our universe’s evolution.

Andromeda galaxy yields star birth secrets

Are the same percentages of stars with gargantuan mass, low mass and intermediate mass born everywhere throughout space?

Gargantuan gas halo around Andromeda galaxy

A dark halo of gas that envelopes our neighboring Andromeda galaxy is 1,000 times more massive than previously measured and stretches halfway to the Milky Way.

New sharpest-ever view of Andromeda galaxy

The image has a staggering 1.5 billion pixels, so you’d need 600 HD television screens to display it. A piece of the image, and links to a zoomable version, here.

Andromeda Galaxy

Beautiful shot of M31 – closest large spiral galaxy to our Milky Way – by our friend Tom Wildoner.

Milky Way is about half as massive as Andromeda galaxy, say astronomers

Dark matter makes up 90% of the matter in both systems, the study finds.

Will the Andromeda galaxy someday collide with our Milky Way?

The Andromeda galaxy is approaching our Milky Way galaxy across the vastness of space. When will they collide?

A gamma ray burst from the Andromeda galaxy yesterday? No.

No GRB in M31. False alarm. Darn.

Night sky as Milky Way and Andromeda galaxies merge

As seen on Cosmos … the collision and merger between our Milky Way galaxy and the nearby Andromeda galaxy 4 billion years from now.

Galaxies near and far: Milky Way and Andromeda

Central starry pathway is the Milky Way, our home galaxy. The Andromeda galaxy is an elongated fuzzy patch, just right of center.

panstarrs near andromeda

Comet PANSTARRS near Andromeda galaxy

Look for Comet PANSTARRS in early April 2013 near the Andromeda Galaxy.

Want to help identify star clusters in Andromeda galaxy?

Astronomers are inviting the public to search Hubble Space Telescope images of the Andromeda galaxy to help identify star clusters.

Andromeda Galaxy as Local Group’s resident bully

Andromeda will collide with our MIlky Way in 4 billion years. It had a close encounter with another Local Group galaxy long ago. Yeah, Andromeda. You’re tough.

Video of Andromeda Galaxy in many colors

Rainbow colors from our neighboring galaxy – some invisible to the eye, but visible to ESA telescopes – reveal the life cycle of stars.

Best-ever portrait of Andromeda Galaxy in ultraviolet

If you were on a planet orbiting a star in this galaxy, and could look back our Milky Way galaxy, it’s thought our home galaxy would look a lot like this.

Photos from 2019’s Perseid meteor shower

It’s a very special group of images of this year’s Perseid meteor shower, many taken in bright moonlight. Thanks to all who contributed photos!

Check out these interacting galaxies

Hubble image of an interacting galactic duo known as UGC 2369.

Artist's concept of local void, a huge bubble-like feature in space.

Astronomers map our local cosmic void

Our universe is a tapestry of galaxy congregations and vast voids. An international team of astronomers has now published a new study revealing more of this cosmic structure as it appears surrounding our Milky Way.

Photographic image showing flat galactic disk. The inset shows dark lanes of dust, where stars form.

Star formation burst created 50% of Milky Way disk stars

Analysis of data from the Gaia satellite shows a powerful burst of star formation – a stellar baby boom – in our Milky Way galaxy 2 to 3 billion years ago. This single burst might have created half the stars in the galaxy’s flat disk.

A diffuse galaxy.

Astronomers find 2nd galaxy lacking dark matter

Dark matter theory – the idea that a huge fraction of our universe exists in a form we can’t see – is a cornerstone of modern cosmology. Ironically, galaxies lacking dark matter might help confirm the theory.

Milky Way galaxy art, with 1 side of the galaxy tilted up, and 1 side tilted down.

Our Milky Way is warped

A team of astronomers has produced a 3D map of our galaxy, the 1st accurate one, they say. It reveals our galaxy’s true shape as warped and twisted.

Locate Cassiopeia the Queen

An earlier name for Cassiopeia was Cassiopeia’s Chair. A legend from ancient Greek mythology explains why.

Merging galaxies. Both appear to have long tails, which is why these 2 galaxies are nicknamed The Mice.

New tool reveals ‘missing’ merging galaxies

Astronomers see many breathtaking merging galaxies, with their giant tidal streams of stars and unusual shapes. But some normal-looking galaxies might be merging, too. Now astronomers have a new tool to find out.

Photo of the Whirlpool galaxy (M51) with a bridge of stars leading out to its smaller dwarf companion, NGC 5195

Galaxy collision to send solar system flying?

A new computer simulation shows the Large Magellanic Cloud is hurtling toward our galaxy on a collision course. Could the collision knock our solar system out of the Milky Way?

Like a hat in the sky

Yuri Beletsky captured this lenticular cloud on a mid-December night in the Chilean Andes Mountains.

What is the Local Group?

How many galaxies are now known to lie within our Local Group of galaxies? How does our Milky Way rank, size-wise? And what about the vast superclusters beyond?

A giant relic of a disrupted tadpole galaxy

The tail of the “tadpole” is some 500,000 light-years long. If it were at the distance of the Andromeda galaxy – about 2.5 million light years from Earth – it would reach a fifth of the way to our own Milky Way.

Messier 33: 2nd-closest spiral galaxy

The Triangulum galaxy, aka Messier 33, is 2.7 million light-years away, and the 3rd-largest member of our Local Group, after the Milky Way and Andromeda galaxies.

Today in science: Edwin Hubble and the expanding universe

Last month, the International Astronomical Union – same organization that demoted Pluto to dwarf planet status – voted to rename Hubble’s law as the Hubble–Lemaître law. Will astronomers use the new name?

Merging galaxies fuel mega black holes

It hasn’t been easy for astronomers to peer into the cores of merging galaxies. Dust obscures the view. Now, new research has given astronomers a better look.

Almach: Quadruple star system

With your eyes alone, Almach looks like a single star. Through a telescope, it looks like a colorful duo. But today we know Almach is really 4 stars.

Look for constellation Cassiopeia the Queen

It’s an easy constellations to identify. On these October evenings, look for Cassiopeia the Queen high in the northeast sky, not far from the North Star.

What is a parsec?

Why do professional astronomers speak of distances in the universe not in terms of light-years, but in terms of parsecs, a distance of 3.26 light-years? Explanation here.

How far is a light-year?

How can we comprehend the distances to the stars? This post explains light-years in terms of a scale of miles and kilometers.

The Milky Way’s long-lost sibling

Two billion years ago, the Andromeda galaxy – closest large spiral galaxy to our Milky Way – might have eaten another large galaxy.

Great Basin National Park

As of spring 2016, Great Basin has been designated an International Dark Sky Park. Astronomy program days and start times change throughout the year. On a clear, moonless night in Great Basin National Park, thousands of stars, five of our solar system’s eight planets, star clusters, meteors, man-made satellites, the Andromeda Galaxy, and the Milky…read more »

Gaia’s view of Large Magellanic Cloud

The Large Magellanic Cloud (LMC), one of the nearest galaxies to our Milky Way, as viewed by ESA’s Gaia satellite after its first 14 months of operations.

Astronomers chart galaxy orbits in our Local Supercluster

“For the first time, we are not only visualizing the detailed structure of our Local Supercluster of galaxies, but we are also seeing how the structure developed over the history of the universe.”

Menkar is the Whale’s alpha star

It’s not the most famous star in Cetus the Whale, or the brightest, although it carries the designation Alpha. But Menkar has its own claims to fame.

How to see the Great Square of Pegasus

It’s easy! The Great Square of Pegasus consists of 4 stars of nearly equal brightness in a large square pattern. Once you find it, you can star-hop to other well-known sights in the sky.

A famous variable star in Cepheus

With clock-like precision, the star Delta Cephei doubles in brightness every 5.36 days. You can notice this brightness change with the eye alone.