Hu, X.: Normal Gravity Fields and Equipotential Ellipsoids of Small Objects in the Solar System: A Closed-Form Solution in Ellipsoidal Harmonics Up to the Second Degree. Astrophysical Journal 850 (1), 107 (2017)
Hu, X.: The exact transformation from spherical harmonic to ellipsoidal harmonic coefficients for gravitational field modeling. Celest. Mech. Dyn. Astron. 125 (2), pp. 195 - 222 (2016)
Analyzing the high spatial resolution solar Ca II H and K emission data obtained by the SUNRISE mission and building a model of other stars more active than the Sun
First Light for Sunrise III: the first tests with real sunlight were successful. The balloon-borne solar observatory should be ready for launch at the end of May.
First icy cold, then midnight sun: at the Arctic Circle, the team will prepare the next flight of the balloon-borne solar observatory - and hopes for solar fireworks.
Astronomical teamwork: By combining data from Solar Orbiter and SDO, a group of researchers has unambiguously determined the magnetic field at the solar surface.
Images from ESA’s Solar Orbiter offer the best look yet at a source region of the solar wind - and challenge our view of the continuous particle stream from the Sun.