NASA warns the Sun is 'waking up' again and could affect GPS, radio, and the power grid

The Sun's activity is rising again after decades of decline, surprising scientists and raising concerns about space weather.

Voici comment on explore le cœur du Soleil sans jamais l’observer directement

Au cœur de notre système solaire, le Soleil brille comme un gigantesque laboratoire de physique fondamentale. Depuis 4,6 milliards d'années, cette étoile maintient des réactions de fusion...

New Theory Might Explain Our Sun's Wacky Rotation

The Sun's rotation is, in a word, bizarre.

Obituary: Wasaburo Unno (1925 – 2023) - Solar Physics

New Simulation Reveals the Churning Interiors of Giant Stars

Stellar fusion happens at a star's core, where the enormous temperatures and pressures fuse hydrogen atoms into helium, releasing radiation. Waves of turbulent convection generated in the core can take hundreds of thousands of years to ripple outward through the stars' layers, finally reaching the surface. A new simulation shows waves generated deep inside stars, more massive than the Sun, make their way to the surface and affect the star's brightness.

<i>Oscillations in internal fluid layers of planets, moons and stars</i>

Oscillations in internal fluid layers play an important role in the dynamics and evolution of planets, moons and stars. In these objects, the Coriolis force supports the existence of inertial waves, while buoyancy gives rise to internal gravity waves. When a magnetic field is present, magnetic Alfvén waves can also exist. In realistic situations, all these types of motion combine to produce complex oscillations.  While inertial (Rossby) and internal gravity waves were initially described in the context of atmospheric and oceanic science, they are also a long-standing subject of study in the Earth’s liquid core and in the subsurface oceans of icy moons. Inertial waves have also been recently identified in Sun's convective envelope and are cited as an important ingredient in gas giants' dynamics.  This interdisciplinary session aims to bring together scientists from the Earth, Solar, and planetary communities to synergistically consolidate our collective knowledge of these phenomena.

<i>Oscillations in internal fluid layers of planets, moons and stars</i>

Oscillations in internal fluid layers play an important role in the dynamics and evolution of planets, moons and stars. In these objects, the Coriolis force supports the existence of inertial waves, while buoyancy gives rise to internal gravity waves. When a magnetic field is present, magnetic Alfvén waves can also exist. In realistic situations, all these types of motion combine to produce complex oscillations.  While inertial (Rossby) and internal gravity waves were initially described in the context of atmospheric and oceanic science, they are also a long-standing subject of study in the Earth’s liquid core and in the subsurface oceans of icy moons. Inertial waves have also been recently identified in Sun's convective envelope and are cited as an important ingredient in gas giants' dynamics.  This interdisciplinary session aims to bring together scientists from the Earth, Solar, and planetary communities to synergistically consolidate our collective knowledge of these phenomena.

[DY2W03] Contributed talk: Identification of inertial normal modes in the solar convection zone - Isaac Newton Institute

The observation of global acoustic waves (p modes) in the Sun has been key to unveiling its internal structure and dynamics. A different kind of waves, known as...