Asteroseismology

Asteroseismology is the study of oscillations and vibrations in stars, which allows scientists to probe the internal structure and dynamics of these celestial bodies. Just as seismologists study earthquakes to learn about the Earth's interior, asteroseismologists analyze the pulsations of stars to gather information about their internal layers, composition, age, and evolutionary state.

Neutron-star oscillation refers to the phenomenon in which neutron stars, extremely dense remnants of massive stars that have undergone supernova explosions, exhibit oscillatory modes of vibration or oscillation. These oscillations can occur in various forms and have different physical origins, providing key insights into the properties of neutron stars and the states of matter under extreme conditions. ### Types of Oscillations 1. **Fundamental Oscillations**: These involve the star expanding and contracting as a whole.

Solar-like oscillations refer to a type of oscillatory behavior observed in stars, particularly in the Sun and other stars that are similar in mass and temperature. These oscillations are typically driven by pressure (p-modes), and they arise from the star's buoyancy and oscillatory modes of movement. In the context of solar-like oscillations: 1. **Modes of Oscillation**: The oscillations can be classified into various modes based on their frequency and wavelength.

The Transiting Exoplanet Survey Satellite (TESS) is a NASA mission designed to search for exoplanets, which are planets located outside our solar system. Launched on April 18, 2018, TESS aims to identify new exoplanets by monitoring the brightness of nearby stars for periodic dips in brightness, a method known as the transit method.

The Whole Earth Telescope (WET) is an international collaboration aimed at monitoring variable stars and other astronomical phenomena on a continuous basis. It consists of a network of observatories around the world, which allows astronomers to observe the same object continuously over periods of time that may span from days to weeks. This global coordination takes advantage of different time zones and the Earth's rotation to provide nearly uninterrupted observations.