1. Periodic orbits of the two fixed centers problem with a variational gravitational field

   • Fabao Gao
   • Jaume Llibre

   Original Article 04 August 2020 Article: 39

   

2. Homoclinic dynamics in a spatial restricted four-body problem: blue skies into Smale horseshoes for vertical Lyapunov families

   • Maxime Murray
   • J. D. Mireles James

   Original Article 28 July 2020 Article: 38

   

3. Evolution of orbits about comets with arbitrary comae

   • Mark Moretto
   • Jay McMahon

   Original Article Open access 21 July 2020 Article: 37

   

4. Centaur and giant planet crossing populations: origin and distribution

   • Romina P. Di Sisto
   • Natalia L. Rossignoli

   Original Article 20 July 2020 Article: 36

   

5. Lunar close encounters compete with the circumterrestrial Lidov–Kozai effect

   • Davide Amato
   • Renu Malhotra
   • Aaron J. Rosengren

   Original Article 20 July 2020 Article: 35

   

6. Analysing the Main Belt asteroid distributions by wavelets

   • R. V. Baluev
   • E. I. Rodionov

   Original Article 20 July 2020 Article: 34

   

7. Retrograde periodic orbits in 1/2, 2/3 and 3/4 mean motion resonances with Neptune

   • T. Kotoulas
   • G. Voyatzis

   Original Article 20 July 2020 Article: 33

   

8. Pfaffians and the inverse problem for collinear central configurations

   • D. L. Ferrario

   Original Article 13 July 2020 Article: 32

   

9. Inner third-body perturbations

   • Guy Marcus
   • Pini Gurfil

   Original Article 11 July 2020 Article: 31