[*]Reagan won in '76, not '80 (which makes sense; he nearly primaried Ford in OTL, who wouldn't be the incumbent here). He also won reelection (obviously).
[*]The Soviets have an N3 rocket, which a subtitle claims is the "biggest rocket ever launched" (note that this was before the Sea Dragon launch). Interestingly, based on the newspaper dates, this would've been a few months *before* Reagan's election (wonder if it played a role).
[*]Nobody gives a **** about the Outer Space Treaty.
[*]NASA launched a Mars rover sometime in the late '70s (in OTL, the first Mars rover wasn't until the '90s, and no missions to Mars were launched between the USA's Viking 2 in '75 and the USSR's Phobos 1 in '88, so no idea what this could be).
[*]Elvis is dead (R.I.P.).
[*]Roman Polanski was arrested (in OTL, he escaped to Poland, where he still is).
[*]The Camp David Accords failed (uh oh).
[*]The Soviets didn't invade Afghanistan (which has big implications for Pakistan and the Taliban, and will likely lead to no 9/11). They actually showed a picture of Bin Laden here (though he wouldn't have been nearly as famous had the Soviets not invaded).
[*]Inflation in the US continued through the early 80s, as in OTL (but here it will likely hurt Reagan instead helping him).
[*]Three Mile Island didn't have its famous meltdown, likely meaning there will be more nuclear power, and maybe safer reactors (though the first RMBK reactors will have already been built in the USSR). On a less-serious note, this has implications for the lyrics to the bridge of the Jimmy Buffet song Volcano.
[*]Margaret Thatcher is the Prime Minister of the UK (in OTL, she was rather anti-space...that probably isn't the case here).
[*]The Iran Hostage Crisis ended in a rescue by the military (instead of most being released upon Reagan's inauguration and the rest snuck out by "Canada") that left 4 hostages and 3 soldiers dead.
[*]Poland has cracked down on Solidarity, just as in OTL (Solidarity was an anticommunist union - yes, that was a thing - that continued to operate underground and ultimately won elections in '89).
[*]Mt. St. Helens still erupted.
[*]The Strategic Defense Initiative exists (Reagan's "Star Wars" program). We didn't see anything of Space Station Freedom, though, so presumably that's not a part of it.
[*]Chrysler managed to last until '81 without a bailout instead of '79 like they did in OTL, but in this timeline, that bailout never came, so they went bankrupt.
[*]The "Miracle on Ice" was instead a 10-3 defeat for the US.
[*]Someone shot J.R., just as in OTL (J.R. was not a real person; this was an advertising campaign for Dallas).
[*]Lennon survived his assassination attempt.
[*]John Paul II did not survive his assassination attempt (in OTL, he was shot four times by Mehmet Ali Ağca, a member of the far-right Turkish "Grey Wolves" organization, but he lived another two decades; there are largely unsubstantiated theories that the Soviet Union played some role in the assassination attempt). No word on who took over as the new Pope.
[*]Anwar Sadat survive his assassination attempt (in OTL, he was killed by the Egyptian Islamic Jihad) It's strange that the attempt happened at all, since without the Camp David Accords, the EIJ would've had much less reason to dislike him. I'm going to assume the subsequent insurrection was even less successful than it was in real life (where they managed to control one mid-sized city for a couple of days).
[*]Reagan fired the striking air traffic controllers, just as in OTL.
[*]Yuri Andropov became Premier of the Soviet Union in '82 after Leonid Brezhnev's death, just as in OTL.
[*]Sandra Day O'Connor became the first woman to serve on the Supreme Court in '81 after Potter Stewart's retirement, just as in OTL.
[*]Cats (the musical) still exists (yes, this was in there).
[*]Camilla, Duchess of Cornwall, married Charles, Prince of Wales
[*]The first space shuttle launch was in '81 (just as in OTL), but this is apparently a slightly souped-up shuttle that can also reach the moon (in OTL, there were vague plans for a "moon-to-orbit" shuttle in the early days of STS planning, but it would've looked much more like the Apollo vehicle than what we usually think of as a space shuttle, and couldn't have handled reentry).
[*]The first space shuttle is named "Enterprise", after the Star Trek ship; based on comments later in the show, it is apparently capable of reaching space (in OTL, the prototype shuttle was named "Enterprise", but it wasn't capable of reaching space).
[*]It seems that John Hinckley Jr. didn't attempt to assassinate Reagan in '81. Or, if he did, it didn't make the opening newsreel.