New observations suggest that the dwarf planet Makemake is surrounded by faintly glowing methane gas. Scientists are unsure ...

Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

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By Will Dunham WASHINGTON (Reuters) -Astronomers using the Hubble Space Telescope have observed a white dwarf - a highly ...

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Pluto hasn't been a planet for almost 20 years. In the early 2000s, scientists discovered several objects of a similar size to Pluto. So, during the summer of 2006, members of the International ...

Arizona Governor Katie Hobbs signed a law making Pluto the state's official planet. That's even though an international group of scientists stripped Pluto of its planetary status back in 2006, ...

At the vast edge of the solar system, Pluto has long been perceived as a cold and lonely dwarf planet. However, a recent groundbreaking study has revealed that it may have had an extraordinarily fiery ...

The year was 2015. After traveling billions and billions of miles through the Erebus, New Horizons encounters the boatman, and the somber lord of the departed. The spacecraft could have been called ...

Normally when a medium-size star dies, it blasts away the bulk of material in its system. The Hubble discovery was surprising ...