The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Please note that more material may be added to this page periodically, so checking back occasionally is encouraged. The NASA AAA program currently also offers an Astronomy Academy for teacher ...

Using an instrument on the 4.1-meter Southern Astrophysical Research Telescope, researchers have obtained the first astronomical spectrum using skipper charge-coupled devices (CCDs). The results ...

Pandora, a small satellite, is set to study at least 20 known exoplanets to analyze their atmospheres for hazes, clouds, and ...