Each class is subdivided into ten and numbered from 0 to 9. The Sun is a G2 star. The “V” is the Roman numeral for five and designates the Sun’s luminosity class. Stars in luminosity classes I, II, ...

Earth resides within the sun's habitable zone, ensuring our planet sustains life. NASA scientist Noah Tuchow explains how ...

A Roman numeral can also be added to indicate the luminosity class of the star, with I for supergiants, II for bright giants, ...

For Marisol Catalan Olais, a senior McNair Scholar at the University of Delaware, astrophysics combines the things she loves ...

Leavitt's work with variable stars led to her most important contribution to the field: the cepheid variable period-luminosity relationship. By intense observation of a certain class of variable ...

Estimates of how fast the universe is expanding disagree. Could a new form of dark energy resolve the problem?

Are there planets beyond Earth where humans can live? The answer is maybe, according to physicists examining F-type star systems. Are there planets beyond Earth where humans can live? The answer ...

If you’re unsure about what “glotion” is, exactly, it can best be described as a versatile and complexion-boosting product ...

"Magic cream was the very first product I ever created – I was creating skincare innovations long before makeup magic," says ...

Plants and pets: Your furry friends and greenery add more life to your spaces. For your green thumb, find tips for saving ...

Each class is subdivided into ten and numbered from 0 to 9. The Sun is a G2 star. The “V” is the Roman numeral for five and designates the Sun’s luminosity class. Stars in luminosity classes I, II, ...