The solar system has eight planets. In 2006, astronomers reclassified Pluto as a dwarf planet, the same class that contains Eris, Sedna, Quaoar, Ceres and perhaps many more solar system small bodies. These are defined approximately ...
Astronomy
Mar 14, 2022
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815
NASA's Near-Earth Object Observation Program painstakingly documents all asteroid sightings that could pose a potential threat to our planet. However, geographical constraints mean that somewhere between 2% and 7% of asteroids ...
Astronomy
Mar 1, 2022
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6
A fresh analysis of the possible cooling effect of the sulfur dioxide injected into the atmosphere by the Hunga Tonga-Hunga Ha'apai volcano in January 2022 has concluded that the impact will be much smaller than initially ...
Earth Sciences
Mar 1, 2022
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13
The third-largest crater on the dwarf planet Ceres was geologically active at least once many millions of years after its formation. In a recent study published today in the journal Nature Communications, researchers from ...
Astronomy
Feb 22, 2022
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376
The massive underwater volcanic eruption in Tonga has brought heated discussions concerning how it may affect the global climate.
Environment
Feb 18, 2022
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221
A state-of-the-art asteroid alert system operated by the University of Hawaiʻi Institute for Astronomy (IfA) can now scan the entire dark sky every 24 hours for dangerous bodies that could plummet toward Earth.
Space Exploration
Jan 29, 2022
3
332
Clouds in the southern hemisphere reflect more sunlight than those in the northern hemisphere. The reason is a more frequent occurrence of liquid water droplets, which results from an interplay between updrafts and a cleaner ...
Environment
Jan 27, 2022
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23
Caltech researchers used the Mars Reconnaissance Orbiter to determine that surface water left salt minerals behind as recently as 2 billion years ago.
Astronomy
Jan 26, 2022
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66
Above the equator, winter officially begins in December. But in many areas, January is when it really takes hold. Atmospheric scientist Deanna Hence explains the weather and climate factors that combine to produce wintry ...
Planetary Sciences
Jan 10, 2022
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50
While the entire world focuses on achieving carbon neutrality—zero carbon dioxide (CO2) emissions—new research shows climate change in some regions is inevitable even if the already increased CO2 level is reduced. As ...
Earth Sciences
Dec 22, 2021
0
108
