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ORNIS FENNICA, ISSN 0030-5685, 2019, Volume 96, Issue 2, pp. 100 - 100
An obituary for Seppo Sulkava, professor emeritus of zoology, who died at the age of 87, is presented. Sulkava made an extensive career starting 1961 at a... 
ORNITHOLOGY | Breeding | Zoology | Careers | Birds | Ecology | Museums | Biology | Research | Birds of prey | Ecologists | Prey | Obituaries | Researchers | Small mammals | Retirement | Food
Journal Article
JOURNAL OF RAPTOR RESEARCH, ISSN 0892-1016, 09/2019, Volume 53, Issue 3, pp. 364 - 366
Journal Article
Nature, ISSN 0028-0836, 12/2012, Volume 492, Issue 7428, pp. 221 - 224
The formation of very wide binary systems(1-3), such as the a Centauri system with Proxima (also known as a Centauri C) separated from a Centauri (which itself... 
EVOLUTION | CATALOG | HIPPARCOS STARS | MULTIDISCIPLINARY SCIENCES | PROPER MOTION | TERTIARY COMPANIONS | CLUSTER | DISK | Evolution | Research | Star formation | Galaxies | Observations | Stars, Double | Collapsing | Clouds | Dynamics | Stars | Clusters | Binary systems | Orbits | Dynamical systems
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 04/2016, Volume 457, Issue 2, p. 1137
  The quasi-satellite phenomenon makes two celestial bodies to fly near each other (Mikkola et al.) and that effect can be used also to make artificial... 
Earth | Moons | Astrophysics | Low earth orbit satellites | Orbits | Acceleration | Star & galaxy formation
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 04/2016, Volume 457, Issue 2, pp. 1137 - 1137
The quasi-satellite phenomenon makes two celestial bodies to fly near each other (Mikkola et al.) and that effect can be used also to make artificial... 
Satellites | Eccentricity | Preserves | Thrusters | Constants | Formations | Acceleration | Ion thrusters
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 04/2013, Volume 430, Issue 4, p. 2822
  The logarithmic Hamiltonian leapfrog algorithm solves the two-body problem with only a phase error. This is true independent of orbital eccentricity and thus... 
Mathematical problems | Algorithms | Orbits | Astronomy
Journal Article
Nature, ISSN 0028-0836, 12/2012, Volume 492, Issue 7428, p. 221
  The formation of very wide binary systems, such as the a Centauri system with Proxima (also known as a Centauri C) separated from a Centauri (which itself is... 
Stars & galaxies | Population | Astronomy
Journal Article
Celestial Mechanics and Dynamical Astronomy, ISSN 0923-2958, 6/2019, Volume 131, Issue 6, pp. 1 - 20
We look for triple collision orbits which are collisionless before triple collision. We developed a procedure of fixing the positions of these orbits inside... 
Triple collision orbits | Astrophysics and Astroparticles | Three-body problem | Classical Mechanics | Numerical search | Geophysics/Geodesy | Dynamical Systems and Ergodic Theory | Aerospace Technology and Astronautics | Physics | Orbits | Free fall | Binary stars | Digits | Intersections | Three body problem | Cylinders
Journal Article
Journal Article
Publications of the Astronomical Society of Japan, ISSN 0004-6264, 12/2015, Volume 67, Issue 6, p. 115
Using the symbols and symbol sequences along the orbits introduced in our preceding work, we numerically study the orbital structure of the free-fall... 
three-body problem | celestial mechanics | chaos | TRIPLE COLLISION | COLLISION ORBITS | SEARCH | ASTRONOMY & ASTROPHYSICS | EQUAL MASSES
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 2013, Volume 430, Issue 4, pp. 2822 - 2827
The logarithmic Hamiltonian leapfrog algorithm solves the two-body problem with only a phase error. This is true independent of orbital eccentricity and thus... 
Celestial mechanics | CODE | celestial mechanics | MOTION | ALGORITHMIC REGULARIZATION | ASTRONOMY & ASTROPHYSICS | FORCES | BODY PROBLEM | INTEGRATORS
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 04/2016, Volume 457, Issue 2, pp. 1137 - 1144
The quasi-satellite phenomenon makes two celestial bodies to fly near each other (Mikkola et al.) and that effect can be used also to make artificial... 
Celestial mechanics | SYSTEM | ORBITS | celestial mechanics | RELATIVE MOTION | ASTRONOMY & ASTROPHYSICS | Physics - Earth and Planetary Astrophysics
Journal Article
Astrophysics and Space Science Proceedings, ISSN 1570-6591, 2016, Volume 44, pp. 241 - 256
Conference Proceeding
Ornis Norvegica, ISSN 1502-0878, 2016, Volume 39, pp. 6 - 10
Journal Article
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