Science

Collapsing galaxies foreshadow the destiny of the Milky Manner

A brand new telescope picture exhibits that two scattered galaxies will merge 1,000,000 years from now — and preview the destiny of our personal Milky Manner galaxy.

The Gemini North Telescope, positioned atop Maunakea in Hawaii, noticed interacting spiral galaxies about 60 million light-years away within the constellation Virgo.

The galaxy pair NGC 4567 and NGC 4568, also referred to as the Butterfly Galaxies, are simply starting to collide as they’re pulled collectively by gravity.

In about 500 million years, the 2 planetary programs will merge to kind a single elliptical galaxy.

On this first section, the 2 galactic facilities are at present about 20,000 light-years aside, and every galaxy has retained its pinwheel form. When galaxies are perturbed, the power of disintegration results in many star formation occasions. The essential constructions of galaxies change and deviate.

As time passes, they dance round one another in circles that change into smaller and smaller. This dance pulls and spreads a size of wind and stars, merging the 2 galaxies into one thing resembling a twister.

As thousands and thousands of years move, the fuel and dirt wanted to gasoline star delivery are consumed or dispersed, and star formation slows down and stops.

Observations of different galaxy collisions and pc modeling have given astronomers extra proof that the merger of spiral galaxies creates barred galaxies.

When the 2 come collectively, the construction could resemble the elliptical galaxy Messier 89, additionally within the constellation Virgo. When Messier 89 misplaced a lot of the fuel essential to kind stars, the variety of stars born was very low. Now, the galaxy is dwelling to previous stars and previous clusters.

Additionally seen in a brand new kind is the supernova, first seen in 2020, as a shiny spot in one of many spiral arms of the galaxy NGC 4568.

MILKY WAY REVIEW

A galactic merger may happen when the Milky Manner galaxy collides with the Andromeda galaxy, our closest galactic neighbor. NASA astronomers used Hubble information in 2012 to foretell the opportunity of a collision between two spiral galaxies. Estimates put the occasion at 4 billion to five billion years.

In the meanwhile, the enormous cloud surrounding the Andromeda galaxy is colliding with the Milky Manner’s daylight, in line with analysis based mostly on Hubble Area Telescope information printed in 2020.

Andromeda’s halo, a big envelope of fuel, extends 1.3 million light-years from the galaxy, about half of which is within the Milky Manner, and a pair of million light-years in different instructions.

This shut companion is about the identical measurement, containing 1 trillion stars as our Milky Manner galaxy, and is 2.5 million light-years away. It sounds very distant, however on an astronomical scale, Andromeda is as shut as it may be to being seen in our tropical sky. You possibly can see that the cigar seems like a light-weight, excessive within the sky throughout the fall.

And if we had been to see Andromeda’s big eye, invisible to the bare eye, it could be 3 times the scale of the Massive Dipper constellation, which is far smaller than our sky.

NASA scientists say the merger of the Milky Manner and Andromeda could not destroy our photo voltaic system, however the solar could also be kicked into a brand new area of the galaxy — and the planet’s sky could have a tremendous new view. .

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