The planet Mars hosts an atmosphere that is perhaps the closest in terms of its meteorology and climate to that of the Earth. But Mars differs from Earth in its greater distance from the Sun, its smaller size, its lack of liquid oceans and its thinner atmosphere, composed mainly of CO(2). These factors give Mars a rather different climate to that of the Earth. In this article we review various ...

C/2020 F3 (NEOWISE) was discovered in images from the Near Earth Object program of Wide-Field Infrared Survey Explorer taken on 2020 March 27 and has become Great Comet 2020. The Solar Wind ANisotropies (SWAN) camera Heliospheric Observatory (SOHO) spacecraft, located a halo orbit around Earth–Sun L1 Lagrange point, makes daily full-sky hydrogen Ly?. Water production rates were determined SWAN ...

ESA has identified interferometry as one of the major goals of the Horizon 2000+ programme. Infrared interferometers are a highly sensitive astronomical instruments that enable us to observe terrestrial planets around nearby stars. In this context the Infrared Space Interferometry Mission (IRSI)/ DARWIN is studied. The current design calls for a constellation of 6 free flying telescopes using 1...

The three-body problem is a powerful tool for understanding non-Keplerian orbits. This project focuses on the Circularly Restricted Three-Body Problem (CRTBP), which can be applied to the Sun-Earth and Earth-Moon systems. In particular, we are interested in the Lagrange points of both systems and the Halo orbits that exist about them. These orbits are important for scientific missions, space st...

This paper presents results from a contingency trajectory analysis performed for the Lunar Atmosphere & Dust Environment Explorer (LADEE) mission in the event of a missed lunar-orbit insertion (LOI) maneuver by the LADEE spacecraft. The effects of varying solar perturbations in the vicinity of the weak stability boundary (WSB) in the Sun-Earth system on the trajectory design are analyzed and di...

We study the impact of flavor-dependent long range leptonic forces mediated by the Le − Lμ or Le −Lτ gauge bosons on the solar neutrino oscillations, when the interaction range RLR is much larger than the Earth-Sun distance. The solar and atmospheric neutrino mass scales do not get trivially decoupled in this situation even if θ13 is vanishingly small. In addition, for α ∼ > 10 and normal hiera...

The exploration of interstellar space will require autonomous navigation systems that do not rely on tracking from the Earth. Here I develop a method to determine 3D position and velocity spacecraft in deep using star catalog. As moves away Sun, observed positions velocities stars change relative those Earth-based catalog due parallax aberration. By measuring just angular distances between pair...

The article, " Are Children Like Werewolves? Full Moon and Its Association with Sleep and Activity Behaviors in an International Sample of Children " by Chaput et al. (1) was quite fascinating and thought-provoking. However, there is a potential flaw in their research – and perhaps in all the medical literature on this subject. Curiously, the study found a small but measurable difference in sle...