Found by @twitaculous

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#OTD in 1781, Uranus was discovered by astronomer William Herschel. #Win a copy of our latest #Uranus issue, available from all good supermarkets and newsagents now! To enter, simply retweet and follow @spaceanswers by Monday

Sometimes promoters tweet more than once.
Tweets will only get updated when you re-fetch them. This helps you because competitions will no longer "jump" between pages when competitions get added or competitions finish while you are browsing them. Competitions get "fetched" when you login or manually re-fetch them with "Forget Ended Competitions & Fetch New Ones". Additionally hidden tweets will stay visible until you "fetch" to save reloading the page and save you from losing your position.