Category Archives: Observables

Observing and Reddit

Interested in learning more about Astronomy or finding a community of people who love astronomy? Try the Astronomy subreddit on the website They have monthly observing challenges and ask/answer all kinds of questions about astronomy. Some examples – “I want to spend my dying years observing the unknown universe from my roof. What’s the best location for that?” “I want to buy my first telescope, I have no idea what I should get. Help?” and my favorite, “How do we know that the universe is expanding and it’s not us that are changing our frame of reference?” Try it out. The people are nice and helpful.

The Reddit Mascot.
The Reddit Mascot. Picture from here

Halley’s Comet

Edmond Halley was the first to predict this comet’s 76 year orbit. It was named in his honor and is known today as Halley’s Comet. Would you like to see it? Stick around until 2061 and you can! Fun fact – Mark Twain was born and died in the same years that Halley’s Comet made an appearance. He even noted in his autobiography that he expected to die in the same year as the comet’s reappearance.

Halley's Comet in 1910
Halley’s Comet in 1910. Picture from here.

If you always take the stairs, you might be able to see her again in 2134 when she’ll be within .09 Atomic Units from earth (relatively close).