What do you think is the biggest science story of the year? 2015 isn’t over yet, but I think it’s safe to say that we have a very good candidate already.
My choice is New Horizons at the Pluto system. Pluto was expected to be a certain way, somewhat like Triton, but it turned out to be completely unique. It was unexpected. It’s likely to still be active, since there’s a huge area covered by ices, there are tall mountains, and the colouration is providing a lot of questions. One of the more recent pictures showed the atmosphere over a horizon that was lit by the sun, and the surface shows mountains. This is that image:
Click the image to see a larger version. Or go here to see the full sized image.
There are still many months of images to download from New Horizons, so we’ll get to see many more surprises over the next year or so.
So, what’s your choice for biggest science news of 2015?