#1740 12.03.2023 15:25 AP

Sky Lights: How We Knew Space Was a Vacuum (2021)

But if you’re looking for “absolute proof” it was in the mid-1940s when Germany fired V-2 rockets across the English Channel from Peenemünde. These rockets were the first to reach outer space (top graphic). Near the apex of their flight they were observed to move along a ballistic trajectory — motion in which gravity is the sole acting force. Ballistic motion can only happen in a vacuum.


#1622 07.02.2023 00:00 AP
Heute ist: Tag der eulerschen Zahl!

... in der US-Schreibweise.


#1602 30.01.2023 22:20 AP
Universität Göttingen

Privatdozent: The Mathematical Center of the Universe (2021)

The inception of quantum mechanics can essentially be traced back to a single “Golden Age” in the mid-1920s at one university: the Georg-August University of Göttingen, in the city of Göttingen, Germany. Home to many notable scientists, the university is associated with no less than 45 Nobel Prize winners. Included in this group are many of the figures responsible for the creation of quantum mechanics, such as Max Born, Werner Heisenberg, James Franck, Wolfgang Pauli, Eugene Winer, Paul Dirac, Enrico Fermi and J. Robert Oppenheimer.


#1594 27.01.2023 00:00 AP
Heute ist: Tag der eulerschen Zahl!

... in der deutschen Schreibweise.


#1515 30.12.2022 16:16 AP

Spektrum.de: In vier Dimensionen geschehen seltsame Dinge

Während sich die niedrigen Dimensionen (eins, zwei und drei) sowie die fünf-, sechs-, sieben- oder noch höherdimensionalen Fälle relativ einfach analysieren lassen, sorgen vier Dimensionen für erstaunlich große Probleme. »Viele Theoreme gelten für alle Dimensionen n, außer für n = 4«, erklärt der Mathematiker Ciprian Manolescu von der Stanford University. »Gerade das macht sie so spannend.«