Tag Archives: science

Saving Britain’s Global Reputation

One of the things that makes me most proud about Britain is how internationally-facing it is. I’ve met Swedes who go to London more than Stockholm, scientists who long for an international conference in Cambridge, Americans who go to the Edinburgh festival, Chileans saving for a trip to London and the Harry Potter Studio Tour, etc. And I love that for decades we’ve attracted the smartest and best people from around the world to work in our banks, on our health service, in our universities. And I don’t think anyone can argue that’s not a good thing. How can taking clever, motivated people from a different background and putting them into your town or city not contribute to society more than detract from it?

But you know that image we cultivated? The one of an outward-facing, forgiving nation? Of a global hub mid way between Paris and New York? Of a liberal yet enterprising island? It is dead. A knife has been taken and thrust into the heart of the identity we projected to the world. Over the past year what I have heard, from foreigners in the UK and people I meet around the world, is somewhere between sorrow and confusion. Suddenly their image of a global Britain has faded. In place of the positives is bland food, rain, and resentment.

And all that was done in the space of one day in June. Damage that will probably take a decade to fix. European doctors, nurses, engineers, scientists, students who would once have jumped at the chance of a year or a life in Britain, are staying away. Those already here are thinking of going home.

And it need not be because anything has changed (although it has). Even if the mood amongst the British towards foreigners hadn’t degraded (and it has – xenophobic resentment is being voiced far louder than before), the spectre than 52% of the population would face economic hardship just to be rid of you looms close. Even if Brexit didn’t effect the sources of money and jobs the previously drew in international workers (and it has – EU science collaborations are shunning UK members, banks & car manufacturers are leaving), the threat of a cut-crazed Tory government going havoc on those industries is enough.

When I meet people abroad and Brexit comes up, I apologise. I try to heal the wound; stick paper over the cracks. But a sceptical eyebrow remains raised. And so it should. The only way Britain can prove that we are still a global nation is with actions. Tearing down meaningless financial and bureaucratic barriers in the way of international immigration. Increasing the funding in science, technology, research, etc, beyond what the EU was previously contributing. Becoming a brain sink rather than a start brain drain. Condemning and stop the acts of xenophobia and racism. And remaining open-for-business to international collaborations (and pay our fair share for the privilege). Only then, and with many years of hard work, can Britain fix its international reputation.

But that can’t happen with a government that’s hell-bent on creating an introspective, austerity-ridden tax haven. The 8th of June is our last chance to save Britain’s global reputation. Lets take it.

The Solar System’s has Four New Neighbors

The number of worlds discovered around other stars is now counted in the thousands. But, if you were to go out on a dark night and try to spot those planet-hosting stars with your own eyes, you would struggle – only 6% of planets orbit stars bright enough for our eyes to pick out. This is especially true of transiting planets; those that pass in front of their star relative to our line of sight. Of more than 1000 such planets known, only one (55 Cancri) is bright enough to see in the night sky. That is, until today…

Position of HD219134 in Stellarium

HD 219134, nestled between Cassiopeia and Cephus, is remarkable in so many ways. It was first studied with HARPS-N, during it’s Rocky Planet Search. This instrument, a spectrograph on the TNG telescope in the Canary Islands, is able to measure the motion of stars so precisely that it can spot the to-and-fro wobble caused by planets.

Amazingly, this instrument found not just one but four planets around this star; a mini solar system just like our own. The outermost is a gas giant on a 3-year orbit, while the inner three are between the size of Earth and Neptune orbiting once every 3, 7 and 47 days.

And the prize for funkiest Colour scheme goes to...
And the prize for funkiest Colour scheme goes to…

ssc2015-02b_Inline[1]At this point, astronomers had no idea if these new worlds transited. But a planet on a 3-day orbit has pretty good odds to pass in front of its star so, taking control of the Spitzer space telescope, they pointed it and hoped. And sure enough, exactly when predicted, the innermost planet blocked out 0.036% of starlight. This fraction is just the surface area of the star covered up, giving a precise measure of the radius of the planet.

Now, with the mass of the planet measured by HARPS and the radius of the planet measured by Spitzer, it’s density can be found. While many similar sized worlds have turned out to be fluffy gas-balls rather than true super-Earths, a density of 5.89gcm-3 puts HD 219134b bang on Earth-like composition. If there was a surface, it’s gravity would be just under twice what we experience on Earth (18.8ms-3). With an orbit of only three days, though, the planet’s star-facing surface is likely to be hot enough to melt!


At only 20 light years away, the newly-discovered solar system around HD219134 is also the closest transiting exoplanet ever found, and one of the 20 closest bright star systems to our Sun. With transiting planets extremely rare, there’s even a chance that this could actually be the closest transiting planet around a bright star (K & G-type).

HD219134’s brightness is also important for astronomers. The brighter & closer a planet, the more interesting ways we can study it. For example, this new world has jumped to the top of the list for those trying to study exoplanet atmospheres. We can also measure the path it takes as it crosses it’s star to determine just how the planet orbits. The outer 3 planets might peturb the orbits of the inner one, causing detectable variations in transit timing (TTVs).

It has truly been a remarkable week for exoplanet astronomy, beginning with the discovery of habitable-zone super-Earth Kepler-452b, and now the detection of the brightest, closest, awesomest transiting planet ever found. And, thanks to a huge array of exciting follow-up options, this will not be the last you’ve heard of HD219134b,



Here’s how you can find the star in the sky (and a very neat animation of the transit):


The paper by Montelabi can be found on arXiv here

Other coverage includes:

Elizabeth Tasker’s piece on “The closest rocky planet ever has been found… so what?

Sci-News: HD 219134: Three Super-Earths Found Orbiting Star 21 Light-Years Away

Daily Mail: Star discovered with THREE Super-Earths, and one is the closest rocky planet ever found outside our solar system Read more: