October 1, 2022

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New image of colliding galaxies shows the fate of the Milky Way

The Gemini North Telescope, located atop Mauna Kea in Hawaii, discovered spiral galaxies about 60 million light-years away in the constellation Virgo.

A pair of galaxies called the Butterfly constellations NGC 4567 and NGC 4568 have begun to collide as they are gravitationally bound together.

Within 500 million years, the two cosmic systems will merge to form an elliptical galaxy.

At this early stage, the centers of the two galaxies are now 20,000 light-years apart, and each galaxy maintains a pinwheel shape. As galaxies become more entangled, gravitational forces can trigger many events of intense star formation. The original structures of galaxies are altered and distorted.

Over time, they dance around each other in smaller and smaller circles. This tightly coiled dance pulls and stretches long streams of gas and stars, mixing the two galaxies together like a ball.

Over millions of years, this galactic problem will consume or dissipate the gas and dust needed to fuel the birth of stars, causing star formation to slow and eventually stop.

Observations of other intergalactic collisions and computer modeling have provided astronomers with additional evidence that spiral galaxy mergers form elliptical galaxies.

A giant spiral designed by Hubble to spy on the heart of a galaxy

Once the pair merges, the resulting elliptical galaxy may look like Messier 89, also in the constellation Virgo. Once Messier 89 lost most of the gas needed for star formation, very little star birth occurred. Now, the galaxy is home to ancient stars and ancient clusters.

A supernova aurora, first discovered in 2020 It also appears in the new image as a bright spot in the arms of the spiral galaxy NGC 4568.

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Milky Way Connection

A similar galactic merger will emerge when the Milky Way eventually collides with the Andromeda galaxy, the largest and closest galaxy. NASA astronomers used Hubble data in 2012 Predict the timing of a direct collision between two spiral galaxies. This event is estimated to occur in about 4 billion to 5 billion years.
Now, there is a large aura surrounding the Andromeda Galaxy It literally collides with the light of the Milky WayAccording to research based on Hubble Space Telescope data published in 2020.
The Andromeda galaxy pushes the Milky Way

Andromeda’s halo, a large envelope of gas, extends 1.3 million light-years from the Milky Way, half the distance to the Milky Way, and 2 million light-years in other directions.

This neighborhood, home to perhaps a trillion stars, is 2.5 million light-years away, about the size of our own large galaxy. This may seem incredibly far away, but on an astronomical scale, it makes Andromeda so close that it can be seen in our autumn sky. High in the autumn sky you can see it as a cigar-shaped patch of mysterious light.

If we could see Andromeda’s massive halo, invisible to the naked eye, it would be three times the width of the Ursa Major constellation, which dwarfs anything else in our sky.

NASA scientists say it’s unlikely that our solar system will be destroyed when the Milky Way and Andromeda collide, but the Sun may depart for a new part of the galaxy — and Earth’s night sky may have some new scenery.