Former astronaut and U.S. Sen. John Glenn died on Thursday in Ohio. He was 95 years old.

John Glenn in Cape Canaveral, Fla., before his flight into space on Feb. 20, 1962. Glenn, who was hailed as a national hero and a symbol of the space age as the first American to orbit Earth, then became a national political figure for 24 years in the Senate, died on Dec. 8, 2016. He was 95. (NASA via The New York Times)

Glenn became the first U.S. astronaut to orbit the earth in 1962. Upon his return and retirement from space exploration, he represented Ohio in the U.S. Senate from 1974 to 1999.

Later, he became the oldest man in space when he traveled on the Space Shuttle Discovery as a payload specialist in 1998.

Glenn had been in declining health for some years. In June, The Associated Press reported he said he lost some of his eyesight from macular degeneration and a small stroke.

He was hospitalized Wednesday, but the reason for said hospitalization was not clear.

Glenn is survived by his wife of 73 years, Anna, and their children Lyn and David.

An Ohio native, Glenn died at the Ohio State University Wexner Medical Center in Columbus. Shortly after his death, remembrances and tributes to his legacy appeared on Twitter from Ohio representatives and politicians and others.

Here’s a sampling of what people had to say about the passing of John Glenn:

Statement by @POTUS on the Passing of #JohnGlenn.

— Fox News (@FoxNews) December 8, 2016

Today we lost a great pioneer of air and space in John Glenn. He was a hero and inspired generations of future explorers. He will be missed.

— Donald J. Trump (@realDonaldTrump) December 8, 2016

Saddened to hear of the passing of a US hero/astronaut/statesman. His courage inspired a generation to explore & serve. Godspeed John Glenn

— Mike Pence (@mike_pence) December 8, 2016

#JohnGlenn was an American hero.

My full statement ↓

— Paul Ryan (@SpeakerRyan) December 8, 2016

Ohio Gov. John Kasich called Glenn “Ohio’s ultimate hometown hero.”

— John Kasich (@JohnKasich) December 8, 2016

We are saddened by the loss of Sen. John Glenn, the first American to orbit Earth. A true American hero. Godspeed, John Glenn. Ad astra.

— NASA (@NASA) December 8, 2016

We remember American legend Sen. John Glenn. Statement from our Administrator Charles Bolden on Glenn's passing:

— NASA (@NASA) December 8, 2016

The Corps lost a legend today.

Col. John Glenn— an astronaut, a senator, a Marine— died at the age of 95.

Semper Fi, Sir.

— U.S. Marines (@USMC) December 8, 2016

Hillary Clinton marks the death of "a genuine American hero," John Glenn

— CNN Politics (@CNNPolitics) December 8, 2016

Texas politicians also offered their memories and tributes to the late senator and astronaut.

God bless this great American hero. Godspeed, John Glenn.

— Jeb Bush (@JebBush) December 8, 2016

A true American icon.

War hero
1st American to orbit Earth
Last of the Mercury 7 astronauts
U.S. Senator

— Justice Don Willett (@JusticeWillett) December 8, 2016

Ohio State University president Michael Drake said in a statement that Glenn “leaves an undiminished legacy as one of the great people of our time.”

God bless John Glenn. Proud to be among countless millions he inspired; blessed, privileged to know him. Love & sympathy to Ann & family.

— President Drake (@OSUPrezDrake) December 8, 2016

Today, we join the world in mourning the passing of legendary astronaut, senator and Ohioan John Glenn.

— Ohio State (@OhioState) December 8, 2016

Ohio politicians in particular had fond memories of Glenn.

My full statement on my friend John:

— Sherrod Brown (@SenSherrodBrown) December 8, 2016

Deeply saddened to learn of the passing of my dear friend John Glenn. John was an American hero and an #Ohio legend.

— Rob Portman (@senrobportman) December 8, 2016

John and Annie have been a model for Jane and me, and we send our condolences to Annie & the Glenn family at this difficult time.

— Rob Portman (@senrobportman) December 8, 2016

Last year, I had the honor of joining John & Annie Glenn for the official ribbon cutting of the new John Glenn College of Public Affairs.

— Rob Portman (@senrobportman) December 8, 2016

I’m grateful to have known John Glenn, to have partnered w/ him on projects & legislation in Congress, & to have worked w him @Glenn_college

— Rob Portman (@senrobportman) December 8, 2016

And everyone else simply marveled at all that Glenn accomplished in his life.

Aren’t many Heroes left: WWII & Korean War Fighter Pilot. Marine Colonel. NASA Astronaut. Senator. Married 73 yrs. John Glenn RIP 1921-2016

— Neil deGrasse Tyson (@neiltyson) December 8, 2016

Space exploration brings out our best. John Glenn served his country in space, in Congress, and inspired a generation. Onward, John Glenn.

— Bill Nye (@BillNye) December 8, 2016

RIP John Glenn. One of the first astronauts. A Senator. Then made NASA let him go back to space at age 77. HE WENT TO SPACE AT AGE 77!

— Mike Drucker (@MikeDrucker) December 8, 2016

Saddened by the loss of my former astronaut colleague John Glenn. Was very honored to have known him. #Godspeed, John Glenn.

— Scott Kelly (@StationCDRKelly) December 8, 2016

Been a while since I recall anything unifying us. Thank u, John Glenn, for last gift to America- bringing us together in celebration of you.

— Ana Navarro (@ananavarro) December 8, 2016

RIP John Glenn. Astronaut and Senator is a hell of a resume.

— Christopher Hayes (@chrislhayes) December 8, 2016

When I'm 77, I am either going to be dead or so weak that I might as well be.

When John Glenn was 77, he went *back to space.*

— Spencer Ackerman (@attackerman) December 8, 2016

John Glenn has died at 95. When I was young, he was one of most recognizable men in our country. A hero, an astronaut, a senator, a patriot.

— Fran Fraschilla (@franfraschilla) December 8, 2016

RIP John Glenn, and thanks for serving our country for so long in so many ways – always with The Right Stuff

— John Harwood (@JohnJHarwood) December 8, 2016