It is becoming increasingly clear that our modern technological society is vulnerable to the impacts of severe solar storms, radiation, particle and geomagnetic disturbances. However, the potential severity of these extreme solar events and their probability of occurring are unk…
It is becoming increasingly clear that our modern technological society is vulnerable to the impacts of severe solar storms, radiation, particle and geomagnetic disturbances. However, the potential severity of these extreme solar events and their probability of occurring are unk…
NASA's Chandra X-Ray Observatory has ushered in a revolution in X-ray astronomy. Over the last two decades Chandra has captured stunning celestial X-ray images, measured spectra and monitored light curves to reveal and map the hottest, most energetic regions of the universe. Cel…
The Doppler method for the detection of exoplanets
The Doppler method for the detection of exoplanets
The study of exoplanets is one of the most vibrant fields of astrophysics today. Precise radial velocity (RV, or Doppler) measurements created the field by discovering the first exoplanets. Although employed for more than 30 years, RV measurements are still relevant today; when …
The redshifted 21-cm signal is set to transform astrophysical cosmology, bringing a historically data-starved field into the era of Big Data. Corresponding to the spin-flip transition of neutral hydrogen, the 21-cm line is sensitive to the temperature and ionization state of the…
The NASA Kepler and K2 missions have made fundamental, paradigm changing advances in essentially every area of astrophysics and planetary science. While known for their breakthrough discoveries in exoplanets--especially small rocky worlds orbiting in the Habitable Zone of their …
The NASA Kepler and K2 missions have made fundamental, paradigm changing advances in essentially every area of astrophysics and planetary science. While known for their breakthrough discoveries in exoplanets--especially small rocky worlds orbiting in the Habitable Zone of their …