[DOC] [TLE] Why is Pluto no longer considered a planet?| Explore | physics.org [PAR] Discovered in 1930 and once known as the ninth planet of the solar system ... 
Harrington discovered that Pluto has a satellite, which they named Charon. ... In 
the 1950s it was suggested that Pluto was an escaped moon of Neptune, ... 
Astronomers now believe Pluto to be the largest of the known Kuiper belt objects 
(KBOs). [DOC] [TLE] Pluto - Wikipedia [PAR] Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper 
belt, a ring of .... Once Pluto was found, its faintness and lack of a resolvable disc 
cast doubt on the ... Today, the majority of scientists agree that Planet X, as 
Lowell defined it, ..... The mass is much less than thought before Charon was 
discovered. [DOC] [TLE] Why Pluto is No Longer a Planet - Universe Today [PAR] Oct 16, 2016 ... Let's find out why Pluto is no longer considered a planet. .... I thought that Pluto is 
not even considered its own planet, even in the dwarf category. ..... are planets 
including our moon and other satellites that orbit Jupiter and Saturn. ... Besides, 
who gave one group of scientists the right to vote on the subject? [DOC] [TLE] What Is Pluto? | NASA [PAR] Pluto is a dwarf planet that orbits beyond Neptune. ... So scientists believe that, at 
one time, Pluto had more than five moons. .... A black hole is a region in space 
where the pulling force of gravity is so strong that light is not able to escape. ..... 
Satellites that orbit Earth, including the moon, do not always stay the same 
distance... [DOC] [TLE] Does Pluto Have an Atmosphere? - Space.com [PAR] Feb 20, 2016 ... Between its small size and its distant location, the dwarf planet seems unlikely to 
have what it takes. ... New Horizons revealed that, as the atmosphere of Pluto 
escapes into space, some of it is ... Scientists once thought that Pluto could have 
clouds, but New Horizons ... Pluto's Moons | Five Satellites of Pluto. [DOC] [TLE] Exploration of the Planets - National Archives and Records ... [PAR] United States that would include the scientific investigation of all the planets in 
the solar ... It is believed to be one large cinder, with no atmosphere and a day-
night ... Until the flyby of Mariner 4 in 1965, it was thought that Mars was much 
like the Earth. ... bright Martian desert either escaped the devastation of meteorite
... [DOC] [TLE] Discover Pluto - Windows to the Universe [PAR] Sep 11, 2001 ... After the discovery of Neptune in 1846, mathematics suggested that there still 
might be a ninth planet. Scientists set out to discover it, and it was finally 
identified in 1930 ... They say it's really a satellite that escaped Neptune's 
gravitational ... It may seem hard to believe that Pluto could have an atmosphere
... [DOC] [TLE] Pluto and the Solar System | IAU [PAR] In one part of the frame a small object flitted a few millimetres as he switched 
between the two plates. ... Chair of the IAU Planet Definition Committee: "On the 
scientific side, we wanted to ... The first members of the dwarf planet category are 
Ceres, Pluto and Eris, .... A: For now, Charon is considered just to be Pluto's 
satellite. [DOC] [TLE] All eyes on Pluto - OPINION - The Hindu [PAR] Jul 28, 2015 ... Scientists believe that Pluto's atmosphere loses a lot of mass into space ... we 
can study hydrodynamic escape on a planetary scale today. ... NASA plans to 
turn around the spacecraft once it passes Pluto and try to map the planet's night 
... solar system and that of planet and satellite systems are expected to... [DOC] [TLE] Nine Reasons Why Pluto Is a Planet - Philip Metzger [PAR] Apr 13, 2015 ... I believe that was a mistake. ... That will give Pluto an A grade as one of the top 
planets of our solar system. .... Gas escapes from every planet by several 
mechanisms including ... Mixing these would be crazy in any other

Question: Scientists once believed that Pluto was an escaped satellite of this planet
Answer: Neptune