In this study we investigate possible applications of observed S2 orbit around Galactic Center for constraining the Yukawa gravity at scales in range between several tens and thousands astronomical units (AU) to obtain graviton mass constraints. our model suppose that bulk distribution matter (includes stellar cluster, interstellar gas dark matter) exists near Supermassive Black Hole (SMBH) Cen...

Aims. We review the present observational knowledge on the spatial distribution and the physical state of the different (molecular, atomic and ionized) components of the interstellar gas in the innermost 3 kpc of our Galaxy – a region which we refer to as the interstellar Galactic bulge, to distinguish it from its stellar counterpart. Methods. We try to interpret the observations in the framewo...

In the early 1990s, after its Jupiter flyby, the Ulysses spacecraft identified interstellar dust in the solar system. Since then the in-situ dust detector on board Ulysses continuously monitored interstellar grains with masses up to 10−13 kg, penetrating deep into the solar system. While Ulysses measured the interstellar dust stream at high ecliptic latitudes between 3 and 5 AU, interstellar im...

Hydrostatic equilibrium of the multiphase interstellar medium in the solar vicinity is reconsidered, with the regular and turbulent magnetic fields treated separately. The regular magnetic field strength required to support the gas is consistent with independent estimates provided energy equipartition is maintained between turbulence and random magnetic fields. Our results indicate that a midpl...

The observed properties of the local interstellar medium (LISM) have been facilitated by a growing ultraviolet and optical database of high spectral resolution observations of interstellar absorption toward nearby stars. Such observations provide insight into the physical properties (e.g., temperature, turbulent velocity, and depletion onto dust grains) of the population of warm clouds (e.g., 7...

The Ulysses spacecraft has been orbiting the Sun on a highly inclined ellipse almost perpendicular to the ecliptic plane (inclination 79◦, perihelion distance 1.3 AU, aphelion distance 5.4 AU) since it encountered Jupiter in 1992. The in-situ dust detector on board continuously measured interstellar dust grains with masses up to 10−13 kg, penetrating deep into the solar system. The flow directi...

Observations are compared to conflicting predictions about self-gravitational structure formation by the hydro-gravitational theory (HGT) of Gibson 19962003 versus cold-dark-matter hierarchical-clustering-cosmology (CDMHCC) and the Jeans 1902 criterion. According to HGT, gravitational structures form immediately after mass-energy equality by plasma fragmentation at 30,000 years when viscous and...

Observations are compared to conflicting predictions about self gravitational structure formation by the hydro-gravitational theory (HGT) of Gibson 19962003 versus cold dark matter hierarchical clustering cosmology (CDMHCC) and the Jeans 1902 criterion. According to HGT, gravitational structures form immediately by fragmentation after mass-energy equality at 30,000 years when viscous and weak t...

Context. Far-infrared dust emission has a self-similar structure which reveals the complex dynamical processes that shape the interstellar medium. The description of the statistical properties of this emission gives important constraints on the physics of the interstellar medium but it is also a useful way to estimate the contamination of diffuse interstellar emission in the cases where it is c...

Based on Voyager 2 observations, a numerical model of the heliosphere, which includes the mutual interaction of the interstellar medium, solar wind plasma, and interstellar hydrogen, is employed to speculate on the possible crossing of the termination shock by the Voyager spacecraft. The multiple crossings caused by large-scale solar wind uctuations are studied quantitatively. In the event that...