In Astronomy, what does the "Seven Sisters" refer to?

More Questions:

What is Frank Whittle credited with inventing?

What is the connection between Johnny Logan and Sean Sherrard?

Who said, "Do give books - religious or otherwise - for Christmas"?

What Post-Impressionist painter of cabaret and brother life was dubbed the soul of Montmartre?

What quality does a "rhopalic" sentence have?

Which spacecraft was the first one to leave the Solar System?

What does a heliologist study?

How many stars are in the Big Dipper?

In the TV show "The Simpsons', how old is Comic Book Guy?

'Hello, Clara?" is the last line from what Oscar-winning film?

Guitarist Brian May was part of what popular band?

Who did Nathuram Godse murder in 1948?

During what war did hundreds of soldiers spend the winter in Valley Forge?

When did the American Revolutionary War start?

Alba is the Gaelic name for what country?