S.O. wants to help you use your car a little less by hoping on your bike a little more,

especially for those shorter trips, like the popping out for a pint of milk trip,

or the off-to-pick up the kids' trip, or even the Friday night chippy trip.

And to make the swap easier, every day S.O. is giving away an e-bike and 10,000

nectar points that you could spend on cycling gear. Could you do a journey differently?

Search S.O. thoughtful driving to find out more. See terms and conditions at s-o.co.uk.

This is CBS I'm the World, I'm John Batsuit with Dr. Ken Croswell.

He is reporting for the proceedings of the National Academy of Sciences, new thinking about our

beautiful spiral galaxy, the Milky Way. Yes, it's true we're headed to Andromeda,

which is also a beautiful galaxy. We're going to merge, but right now,

the revelations about our galaxy include our place in it, the Sun. We're going around,

it's going to take to earn 30 million years, but in the meantime we're a part of a local arm,

which is constantly being upgraded. Ken, how is it that they now know the local arm extends?

When do you report 26,000 light years? How did this discovery get made? And what does it mean?

It's a good deal longer than a lot of people had thought. 26,000 light years is approximately

the same distance between the Sun and the Glock Accenture. It's a substantial distance,

and it could be longer than that. 26,000 is really just the minimum. In terms of how we learned

that, it was these major parallaxes that established that certain stellar nurseries, certain young

stars, they had been thought to be in the Perseus arm, which is the next arm outward,

actually were closer and were part of the local arm instead. And these new observations from

the Gaia spacecraft confirmed that. So we've got two different indications, both from the radial

observations and the optical observations, that the local arm is quite a bit longer and more vigorous

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