A fresh study of the Kuiper Belt’s structure has revived that far-out question, pointing to a possible Earth-sized ...

Researchers led by Osaka University and NASA find that the distribution of cold planets in the Milky Way is not strongly dependent on the distance from the Galactic center Although thousands of ...

Planetary alignment, or conjunction, refers to the apparent close grouping of planets in the night sky as viewed from Earth, not necessarily a perfect linear alignment in space. These alignments occur ...

Planetary size was determined pre-spacecraft by measuring the planet's angular diameter and its distance from Earth (in AU, later converted to terrestrial units after the AU was accurately measured ...

Seven planets are aligning in the night sky this week, creating a brief chance to see a "planetary parade." Worldwide, the best day to see the alignment is today, Feb. 28. Mercury, Venus, Mars, ...

Mercury reaches its greatest eastern elongation on October 29, appearing farthest from the Sun in the southwestern sky, offering a brief window for observation after sunset.

Get ready skywatchers, another astronomical event will take place on June 3. A planetary alignment, or a "planet parade" according to the internet, where we'll see six planets – Jupiter, Mercury, ...

KINGSPORT, Tenn. (WJHL) —This week, the night sky will provide the opportunity to view up to seven planets in our solar system. Mercury, Venus, Mars, Jupiter and Saturn will be visible to the naked ...