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

More Questions:

How many community cards are there in a hand of Texas Hold "Em?

What two-word phrase is the first writing to appear in "Charlotte's Web"?

Which book begins with the words "It was a bright cold day in April, and the clocks were striking thirteen"?

What is the capital of Cambodia?

What piece of technology did IBM develop in 1973 that they nicknamed Winchester?

What is the common name for the star Sirius?

What was Karen Allen's character's name in "Raiders of the Lost Ark"?

What did Woodsy Owl often exclaim on TV in the 1970s and 1980s?

What 1980s TV show starred Bruce Willis in a detective agency?

What Chilean president was overthrown in 1973 when Augusto Pinochet took power?

Who was known as The Maid of Orleans?

What is the first known form of written communication, found in the Mesopotamian Valley?

Which "Committee of Five" member was the only one to sign all four of the US state papers?

During which month is the longest day in the Southern hemisphere?

The "Strait of Magellan" is part of which continent?