Astronomers discover more than two hundred distinct stars. In a region of space that is a little less than one million light years away from the centre of the Milky Way.

They believe this provides a pretty compelling stellar road sign for the end of our home galaxy.

What is a halo?

A “halo” is a region that is characterised by large amounts of dark matter and less information than the inner regions.

Experts believe that research into our own galaxy helps to inform the structure of other galaxies in the universe. In addition, it also helps to inform research into features in our immediate cosmic neighbourhood.

Key facts!

• The two hundred most distant stars are nicknamed “RR Lyrae stars”.
• The stars were discovered by looking through a cluster of galaxies located beyond the Milky Way.
• The Milky Way is comprised of a centre.
• Around the centre can be found the thin spiral-arm disc where our own solar system resides.
• Followed by the inner and outer “halo” is a region that is characterised by the presence of the centre.
• The halo extends in all directions for hundreds of thousands of light years.
• According to astronomers, the stars in this area were observed to have a rhythmic movement, much like the beating of a heart.
• The RR Lyrae stars are among the oldest stars in the galaxy.
• The discovery will provide astronomers with insight into researching how the Milky Way was formed.
• According to experts, the findings of this study are redefining what comprises the outer edges of our galaxy.

“V101 Science” on YouTube takes you to the centre of the Milky Way.

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