Keller, H. U.; Knollenberg, J.; Markiewicz, W. J.: Collimation of cometary dust jets and filaments. Planetary and Space Science 42, pp. 367 - 382 (1994)
Keller, H. U.; Blum, J.; Donn, B.; Goresy, A. E.; Fechtig, H.; Feuerbacher, B. P.; Grün, E.; Ip, W. -. H.; Kochan, H.; Mann, I.et al.; Markiewicz, W. J.; Metzler, K.; Morfill, G. E.; Ratke, L.; Rott, M.; Schwehm, G.; Weidenschilling, S. J.: CODAG - Dust agglomeration experiment in micro-gravity. Advances in Space Research 13 (7), pp. 73 - 76 (1993)
Kochan, H.; Markiewicz, W. J.; Keller, H. U.: KOSI: Gas drag derived from ice/dust-particle trajectories. Geophysical Research Letters 18 (2), pp. 273 - 276 (1991)
Richter, K.; Curdt, W.; Keller, H.-U.: Velocity of individual large dust particles ejected from comet P/Halley. Astronomy and Astrophysics 250, pp. 548 - 555 (1991)
Curdt, W.; Wilhelm, K.; Craubner, A.; Krahn, E.; Keller, H.-U.: Position of comet P/Halley at the Giotto encounter. Astronomy and Astrophysics 191, pp. 1 - 3 (1988)
Keller, H. U.; Delamere, W. A.; Huebner, W. F.; Reitsema, H. J.; Schmidt, H. U.; Whipple, F. L.; Wilhelm, K.; Curdt, W.; Kramm, R.; Thomas, N.et al.; Arpigny, C.; Barbieri, C.; Bonnet, R. M.; Cazes, S.; Coradini, M.; Cosmovici, C. B.; Hughes, D. W.; Jamar, C.; Malaise, D.; Schmidt, K.; Schmidt, W. K. H.; Seige, P.: Comet P/Halley's nucleus and its activity. Astronomy and Astrophysics 187, pp. 807 - 823 (1987)
Keller, H. U.; Kramm, J. R.; Thomas, N.; Craubner, H.; Mikusch, E.; Schwarz, G.: Images of the GIOTTO fly-by of comet Halley. Bulletin of the American Society 19, p. 878 ff. (1987)
Kramm, J. R.; Möhring, W.; Keller, H. U.: Image restauration using the Point Spread Function of the Halley Multicolour Camera. Geophysical Research Letters 14 (7), pp. 677 - 680 (1987)
Schwarz, G.; Craubner, H.; Delamere, A.; Göbel, M.; Gonano, M.; Huebner, W. F.; Keller, H. U.; Kramm, R.; Mikusch, E.; Reitsema, H.et al.; Whipple, F. L.; Wilhelm, K.: Detailed analysis of a surface feature on comet P/Halley. Astronomy and Astrophysics 187, pp. 847 - 851 (1987)
Keller, H. U.; Arpigny, C.; Barbieri, C.; Bonnet, R. M.; Cazes, S.; Coradini, M.; Cosmovici, C. B.; Delamere, W. A.; Huebner, W. F.; Hughes, D. W.et al.; Jamar, C.; Malaise, D.; Reitsema, H. J.; Schmidt, H. U.; Schmidt, W. K. H.; Seige, P.; Whipple, F. L.; Wilhelm, K.: First Halley multicolour camera imaging results from Giotto. Nature 321, pp. 320 - 326 (1986)
The Planetary Plasma Environments group (PPE) has a strong heritage in the exploration of planetary magnetospheres and space plasma interactions throughout the solar system. It has contributed instruments to several past missions that flew-by or orbited Jupiter (Galileo, Cassini, Ulysses). The PPE participates in the JUICE mission by contributing hardware and scientific expertise to the Particle Environment Package (PEP).
Application deadline 1 October 2024. PhD projects in planetary science, solar and stellar physics, solar magnetism, heliophysics, helioseismology, asteroseismology, ...
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.
In analyzing solar observations from the 19th century, scientists are turning to amateur researchers for help. The project will allow to better understand the history of our star.
Astronomical teamwork: By combining data from Solar Orbiter and SDO, a group of researchers has unambiguously determined the magnetic field at the solar surface.