Our Milky Way galaxy never sits still: it rotates and wobbles. And now, data from the European Space Agency's Gaia space telescope reveal that our galaxy also has a giant wave rippling outwards from ...

But the stellar halo, as this roughly ball-shaped, less dense grouping of stars is called, stretches the limits of the Milky Way out to about 400,000 to 600,000 light-years across. Although it all ...

The European Space Agency’s (ESA) Gaia space telescope has revealed that our Milky Way galaxy has a giant wave rippling outwards from its centre. The unexpected galactic ripple is illustrated in this ...