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A severe geomagnetic storm could cause colorful auroras over Northern California and Alabama
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Colorful auroras could be visible in areas of the United States such as Alabama and Northern California — much farther south than they typically appear — on Thursday evening due to a powerful solar flare and coronal mass ejection released from the sun, according to the National Weather Service’s Space Weather Prediction Center.

The severe solar storm, classified as a level 4 on a scale from 1 to 5, also could disrupt communications, the power grid and satellite operations, according to officials at the center.

The storm is expected to reach Earth between early morning and 12 p.m. ET Thursday, with the potential to last through Friday.

The intensity and full characteristics of the storm, moving toward Earth at more than 2.5 million miles per hour (about 4 million kilometers per hour), won’t be known until it reaches the Deep Space Climate Observatory and the Advanced Composition Explorer satellites orbiting 1 million miles from Earth.

The satellites will measure the speed and magnetic intensity of the storm, which is expected to arrive at Earth 15 to 30 minutes after reaching the space observatories, said Shawn Dahl, service coordinator for the Space Weather Prediction Center, at a news briefing Wednesday.

A series of the most intense type of solar flares, known as X-class flares, have released from the sun this week. The flares also coincided with coronal mass ejections on Tuesday.

Coronal mass ejections are large clouds of ionized gas called plasma and magnetic fields that erupt from the sun’s outer atmosphere. When these outbursts are directed at Earth, they can cause geomagnetic storms, or major disturbances of Earth’s magnetic field.

“Geomagnetic storms can impact infrastructure in near-Earth orbit and on Earth’s surface,” according to the Space Weather Prediction Center.

As a result, the center has notified the Federal Emergency Management Agency, the North American power grid and satellite operators to prepare for disruptions, especially given the amount of preparations and expected relief efforts for Hurricane Milton, Dahl said.

Historically, G4 storms are common during a solar cycle, but G5, or extreme geomagnetic storms such the one that occurred on May 10, are incredibly rare, Dahl said. This new storm has a 25% chance of becoming a G5, he said.

SpaceX Polaris Dawn crew returns home after history-making mission
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SpaceX’s Polaris Dawn crew is home, capping off a five-day mission to orbit — which included the world’s first commercial spacewalk — by splashing down in the Gulf of Mexico.

The Crew Dragon capsule carrying four astronauts landed off the coast of Dry Tortugas, Florida, at 3:37 a.m. ET Sunday.
The Polaris Dawn mission made history as it reached a higher altitude than any human has traveled in five decades. A spacewalk conducted early Thursday morning also marked the first time such an endeavor has been completed by a privately funded and operated mission.

But returning to Earth is among the most dangerous stretches of any space mission.

To safely reach home, the Crew Dragon capsule carried out what’s called a “de-orbit burn,” orienting itself as it prepared to slice through the thickest part of Earth’s atmosphere.
The spacecraft then reached extremely hot temperatures — up to 3,500 degrees Fahrenheit (1,900 degrees Celsius) — because of the pressure and friction caused by hitting the air while still traveling around 17,000 miles per hour (27,000 kilometers per hour). The crew, however, should have remained at comfortable temperatures, protected by the Crew Dragon’s heat shield, which is located on the bottom of the 13-foot-wide (4-meter-wide) capsule.

Dragging against the air began to slow the vehicle down before the Crew Dragon deployed parachutes that further decelerated its descent.