Lonely may refer to:
"Lonely" is a song written by Robin Lee Bruce and Roxie Dean, and recorded by American country music artist Tracy Lawrence. It was released in May 2000 as the second single from the album Lessons Learned. The song reached #18 on the Billboard Hot Country Singles & Tracks chart.
"Lonely" is the second single by South Korean girl group 2NE1 from their 2011 extended play, 2NE1. Later that year, a Japanese version of the song was released and was included on their first Japanese EP Nolza. A short version of the music video was uploaded through 2NE1's official YouTube account.
The song was written and produced by Teddy Park. According to the CEO of YG Entertainment, Yang Hyun Suk, "2NE1’s new song counter feeds the people with an analogue sound unlike the majority who used strong electronics and house music and maybe that is why Will I. Am have [sic] found it interesting". They also released teasers of "Lonely" starting with CL and Minzy on May 9, and Dara and Bom on May 10. The music video was released on May 11, 2011.
By the end of 2011, "Lonely" was downloaded 2,935,930 times, and reached the fourteenth position in the 2011 Gaon Year-End Chart, becoming the third-highest charting of 2NE1's 2011 singles.
The music video for "Lonely" was filmed April 27, 2011, directed by Han Samin, who directed the music video for Big Bang's fourth mini-special album's title song, "Love Song". The video was posted on their YouTube account on May 11, 2011.
An apsis (Greek: ἁψίς; plural apsides /ˈæpsᵻdiːz/, Greek: ἁψίδες) is an extreme point in an object's orbit. The word comes via Latin from Greek and is cognate with apse. For elliptic orbits about a larger body, there are two apsides, named with the prefixes peri- (from περί (peri), meaning "near") and ap-, or apo- (from ἀπ(ό) (ap(ó)), meaning "away from") added to a reference to the thing being orbited.
A straight line connecting the pericenter and apocenter is the line of apsides. This is the major axis of the ellipse, its greatest diameter. For a two-body system the center of mass of the system lies on this line at one of the two foci of the ellipse. When one body is sufficiently larger than the other it may be taken to be at this focus. However whether or not this is the case, both bodies are in similar elliptical orbits each having one focus at the system's center of mass, with their respective lines of apsides being of length inversely proportional to their masses. Historically, in geocentric systems, apsides were measured from the center of the Earth. However, in the case of the Moon, the center of mass of the Earth–Moon system, or Earth–Moon barycenter, as the common focus of both the Moon's and Earth's orbits about each other, is about 74% of the way from Earth's center to its surface.
Apogee, or more formally apsis, is the point, in an elliptical Earth orbit, of greatest distance from the Earth. Ballistic apogee is the highest altitude in the trajectory of a projectile.
Apogee may also refer to: