Imaginary point in the constellation Hercules, near the bright Self-luminous object held together by its own self-gravity. Often refers to those objects which generate energy from nuclear reactions occurring at their cores, but may also be applied to stellar remnants such as neutron stars. Vega, towards which the Our parent star. The structure of Sun's interior is the result of the hydrostatic equilibrium between gravity and the pressure of the gas. The interior consists of three shells: the core, radiative region, and convective region. Image source: http://eclipse99.nasa.gov/pages/SunActiv.html. The core is the hot, dense central region in which the is moving. The Sun’s velocity relative to nearby stars is ~19.7 km/s. The point on the opposite side of the sky from which the Sun appears to be moving away is called the antapex.