Bill Nelson has stepped down as NASA administrator, marking the end of an illustrious 53-year career in public service. Nelson and Deputy Administrator Pam Melroy officially left the agency on Monday, January 20, coinciding with the start of Donald Trump’s second term as president.
Janet Petro, who previously served as director of Kennedy Space Center (KSC) in Florida, has been appointed by President Trump as NASA’s acting administrator.
In a farewell message shared on the social media platform X, Nelson expressed his gratitude, writing, “As I leave public office today after 53 years, thank you for the great privilege of a lifetime of serving the people of our country. I am humbled and grateful.”
Nelson, a member of the Democratic Party, began his political career in 1972 when he was elected to the Florida House of Representatives. Six years later, he moved to the U.S. House of Representatives, representing Florida’s 9th congressional district, an area closely tied to America’s space exploration efforts due to its proximity to KSC and Cape Canaveral Space Force Station.
In January 1986, Nelson made history by flying aboard the space shuttle Columbia during mission STS-61-C, becoming the first sitting U.S. House member to travel to space. The mission’s pilot, Charlie Bolden, would later serve as NASA administrator under President Barack Obama.
Nelson’s flight came just days before the Challenger disaster on January 28, 1986, which claimed the lives of seven astronauts and profoundly shaped NASA’s safety protocols and mission planning in the years to come.
Leading NASA Through a New Era
Appointed as NASA administrator in May 2021 by President Joe Biden, Nelson presided over significant milestones, including the Artemis program’s progress toward returning humans to the Moon, the successful deployment of the James Webb Space Telescope, and the growing role of private companies in space exploration.
Nelson’s departure signals a shift in leadership for NASA as Trump begins his second term. Janet Petro, known for her tenure at KSC, brings extensive experience in space operations and management to the interim role. The long-term trajectory of NASA under Trump’s administration remains a key area of focus, particularly regarding Mars exploration, lunar initiatives, and international partnerships.
As Nelson transitions out of public service, his contributions to space exploration and advocacy remain a significant part of his legacy.
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U.S. President Donald Trump’s inner circle is advising him against speaking with Russian President Vladimir Putin unless Russia commits to a full ceasefire in Ukraine, NBC News reported on Thursday, citing administration officials.
Kirill Dmitriev, Russian President Vladimir Putin’s investment envoy, is visiting Washington this week for talks with members of the Trump administration, sparking fresh speculation over behind-the-scenes diplomacy between Moscow and Washington.
A Russian drone strike hit residential buildings in Kharkiv late on Thursday, killing at least two people and injuring 32 others, Ukrainian officials said, as nightly attacks on the country's cities continue to mount.
In Sydney’s Bennelong, where Chinese Australians make up a large share of the electorate, the fight for votes is playing out on unexpected turf: Xiaohongshu.
The United States is relapsing into an old identity. In 2025, President Donald Trump revived the strategy that once defined the American economy — tariffs. For more than a century, from 1789 to 1913, tariffs powered U.S. government revenues and protected domestic industry.
U.S. President Donald Trump’s inner circle is advising him against speaking with Russian President Vladimir Putin unless Russia commits to a full ceasefire in Ukraine, NBC News reported on Thursday, citing administration officials.
Kirill Dmitriev, Russian President Vladimir Putin’s investment envoy, is visiting Washington this week for talks with members of the Trump administration, sparking fresh speculation over behind-the-scenes diplomacy between Moscow and Washington.
A Russian drone strike hit residential buildings in Kharkiv late on Thursday, killing at least two people and injuring 32 others, Ukrainian officials said, as nightly attacks on the country's cities continue to mount.
In Sydney’s Bennelong, where Chinese Australians make up a large share of the electorate, the fight for votes is playing out on unexpected turf: Xiaohongshu.
Leaders from Central Asia and the European Union will meet in Samarkand on April 4 for the first-ever EU-Central Asia Summit, aimed at deepening ties. Talks will focus on trade, investment, green energy, and security — marking a new era of cooperation.
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