/u/conn77's posts

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Was there any previously unknown land that was discovered after the invention of satellite imagery?

2602 upvotes • r/AskHistorians

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Does dust/particles on the glass affect space telescopes significantly and how is this problem addressed?

42 upvotes • r/askscience

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How did navies before the invention of radio know a port was not hostile?

38 upvotes • r/AskHistorians

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How Pre-radio navies know the port they were going into was not hostile?

25 upvotes • r/AskHistorians

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Title	Upvotes	Subreddit	Mark as read	Favorited	Rating	Add to a list
Was there any previously unknown land that was discovered after the invention of satellite imagery?	2602	AskHistorians
Does dust/particles on the glass affect space telescopes significantly and how is this problem addressed?	42	askscience
How did navies before the invention of radio know a port was not hostile?	38	AskHistorians
How Pre-radio navies know the port they were going into was not hostile?	25	AskHistorians