内容摘要：The finance secretary's medium term financial strategy - a fancy name for looking five years ahead - was postponed until after the Downing Street Spending Review.

The finance secretary's medium term financial strategy - a fancy name for looking five years ahead - was postponed until after the Downing Street Spending Review.

The reversal of the polar magnetic fields on the Sun has been one of the big open questions in science and what we will be able to do with Solar Orbiter is measure for the first time the really important fluid flows that grab pieces of the magnetic field across the Sun and transport them to the polar regions.the Sun is so bright that it appears like a featureless disc.

but these fields then become complex and chaotic as they reorientate with the north and south poles flipping approximately every 11 years.According to Prof Lucie Green of UCL.These solar storms can damage communications satellites and power grids.

This is a phase when the Sun is not able to produce violent explosions.says Prof Christopher Owen.

which are sent out by specific chemical elements hydrogen.

ESASolar Orbiter has taken the closest and most detailed pictures of the Sun.Critics say deploying the National Guard is inflammatory.

When can a president deploy National Guard on US soil?Trump orders National Guard to LA after clashesTrump's intervention in LA is a political fight he is eager to haveFollow the twists and turns of Trump's second term with North America correspondent Anthony Zurcher's weekly US Politics Unspun newsletter.but has lived here since she was a girl.

How LA erupted over rumours of immigration raid at a hardware storeWatch: 'We'll be very.1 hr agoUS Canada14 hrs agoBBC on the ground as National Guard set up in Los AngelesThe BBC's Regan Morris reports from outside a federal building