Category Astronomy/Space

A new study shows a correlation between the end of solar cycles and a switch from El Nino to La Nina conditions in the Pacific Ocean, suggesting that solar variability can drive seasonal weather variability on Earth.

If the connection outlined in the journal Earth and Space Science holds up, it could significantly improve the predictability of the largest El Nino and La Nina events, which have a number of seasonal climate effects over land. For example, the southern United States tends to be warmer and drier during a La Nina, while the northern U.S. tends to be colder and wetter.

“Energy from the Sun is the major driver of our entire Earth system and makes life on Earth possible,” said Scott McIntosh, a scientist at the National Center for Atmosp...

NASA’s Ingenuity mini-helicopter has been dropped on the surface of Mars in preparation for its first flight, the US space agency said. The ultra-light aircraft had been fixed to the belly of the Perseverance rover, which touched down on the Red Planet on February 18.

“MarsHelicopter touchdown confirmed!” NASA’s Jet Propulsion Laboratory tweeted Saturday.

“Its 293 million mile (471 million kilometer) journey aboard @NASAPersevere ended with the final drop of 4 inches (10 centimeter) from the rover’s belly to the surface of Mars today. Next milestone? Survive the night.”

A photograph accompanying the tweet showed Perseverance had driven cle...

NASA’s InSight lander has detected two strong, clear quakes originating in a location of Mars called Cerberus Fossae—the same place where two strong quakes were seen earlier in the mission. The new quakes have magnitudes of 3.3 and 3.1; the previous quakes were magnitude 3.6 and 3.5. InSight has recorded over 500 quakes to date, but because of their clear signals, these are four of the best quake records for probing the interior of the planet.

Studying marsquakes is one way the InSight science team seeks to develop a better understanding of Mars’ mantle and core...

Earth’s sea level has remained fairly constant during the last 541 million years, but a new study suggests the planet may have been covered by a vast global ocean 4 to 3.2 billion years ago.

The new findings challenge earlier assumptions that the size of the Earth’s global ocean has remained constant over time and offer clues to how its size may have changed throughout geologic time, according to the study’s authors.

Most of Earth’s surface water exists in the oceans. But there is a second reservoir of water deep in Earth’s interior, in the form of hydrogen and oxygen attached to minerals in the mantle.

A new study in AGU ...