NASA’s Parker Solar Probe has made history, surviving its closest-ever approach to the Sun. The spacecraft, which launched in 2018, passed a record-breaking 3.8 million miles (6.1 million km) from the Sun’s surface on Christmas Eve, enduring extreme conditions in a mission to unravel some of the star’s biggest mysteries.

Scientists received a signal from the probe just before midnight EST on Thursday, after several days of communication silence during the fly-by. NASA confirmed that the spacecraft was “safe” and operating normally following its perilous journey through the Sun’s outer atmosphere.

The Parker Solar Probe, moving at speeds of up to 430,000 mph (692,000 km/h), experienced temperatures as high as 1,800°F (980°C) during the fly-by. Protected by a specially designed 4.5-inch thick carbon-composite shield, the spacecraft was built to withstand the intense heat and radiation as it plunged into the Sun’s corona—the outermost part of its atmosphere.

“This close-up study of the Sun allows Parker Solar Probe to take measurements that help scientists better understand how material in this region gets heated to millions of degrees, trace the origin of the solar wind, and discover how energetic particles are accelerated to near light speed,” NASA said.

Dr. Nicola Fox, NASA’s head of science, explained that, while scientists have studied the Sun for centuries, we could not fully comprehend its atmosphere until we physically explored it. “We can’t really experience the atmosphere of our star unless we fly through it,” she said.

Despite the extreme conditions, the spacecraft’s speed and shield allowed it to quickly traverse the Sun’s corona, collecting valuable data along the way. Dr. Jenifer Millard, an astronomer at Fifth Star Labs, emphasized the importance of understanding the Sun’s hot corona. “The surface of the Sun is about 6,000°C, but the corona reaches millions of degrees. Scientists have long wondered why the atmosphere gets hotter as it moves further from the Sun.”

The mission will also shed light on solar wind—the stream of charged particles ejected from the Sun’s corona. These particles can interact with Earth’s magnetic field, creating stunning auroras, but they can also disrupt power grids, communications, and satellites, making it crucial to understand space weather.

NASA’s team had been anxiously waiting for a signal from the probe as it navigated the Sun’s intense environment. Dr. Fox expressed her relief when the probe successfully sent back data. “It’s a tough, tough little spacecraft,” she said, acknowledging the mission’s high-risk nature and the engineering that made it possible.

The Parker Solar Probe has already completed 21 fly-bys of the Sun, but its Christmas Eve pass marked a major milestone in the mission, which will continue to provide critical insights into our star’s behavior.

Ukrainian President Volodymyr Zelensky condemned Russia for launching a major attack on Ukraine’s energy infrastructure on Christmas Day, calling it a “conscious choice” aimed at disrupting the holiday and worsening the suffering of Ukrainians.

According to Ukraine’s air force, the country detected 184 missiles and drones in the early morning hours of December 25. While many were intercepted or missed their targets, there were still casualties from the strikes, though official numbers have not been released. The attack caused widespread power outages across Ukraine, including in the capital, Kyiv, where residents sought refuge in metro stations.

Russia confirmed the strike, with the Russian Ministry of Defense stating that its forces carried out a “massive strike” on critical energy facilities across Ukraine. The defense ministry declared the attack a success, confirming that all targets were hit. This marked the 13th major assault on Ukraine’s energy sector this year, according to DTEK, Ukraine’s largest private energy provider. In September, President Zelensky noted that 80% of Ukraine’s energy infrastructure had already been destroyed by Russian bombs.

Zelensky labeled the attack as “inhumane,” emphasizing that it was a deliberate decision by Russia to target Ukrainian energy facilities during Christmas. He assured the public that efforts were underway to restore power as quickly as possible, adding that “Russian evil will not break Ukraine and will not distort Christmas.”

This was the second time Ukraine celebrated Christmas on December 25, after moving away from the traditional date of January 7, which follows the Julian calendar like Russia. The change was made last year to further distance Ukraine from Russian Orthodox traditions.

The northeastern city of Kharkiv, Ukraine’s second-largest city, was severely impacted by the attack, with half a million residents left without water, electricity, or heating in freezing temperatures. The regional governor confirmed the widespread damage and called for urgent assistance.

In Kyiv, air raid alarms rang out across the city, forcing many residents to take shelter in metro stations. Sofiia Lytvynenko, a local resident, told Reuters, “Of course, I want to be at home and celebrate, but we had to shelter because it’s scary to stay at home.” Despite the attacks, Oleksandra, another Kyiv resident, remained optimistic, stating, “Christmas is not cancelled,” and planned to celebrate with family once it was safe.

Ukraine’s state-owned power company, Ukrenergo, warned that power cuts could last into the evening, urging Ukrainians to limit energy use as the restoration process continued.

Meanwhile, Ukrainian Foreign Minister Andrii Sybiha condemned the attacks as “Christmas terror,” highlighting that one of the Russian missiles passed through Moldovan and Romanian airspace, which he said was a reminder of Russia’s broader regional threats. Moldovan President Maia Sandu condemned the missile, confirming that it had been detected in her country’s airspace, while Romania reported no missile sightings in its airspace.

The attack on Ukraine came just hours after Russian shelling in Russia’s Kursk region left four people dead and five others injured, according to the region’s acting governor.