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Play continues on any of the discard piles. However, players may
only play on one pile at a time for any given turn.
Challenging a Match
Any player may challenge a match before the next player makes
a play. Use the Answer Key as a guide.
If a challenge reveals an incorrect match, return the incorrectly
played card to the player’s pile. Play advances to the next player.
Answers May Vary
Matches were assigned using the general characteristics pictured
on the cards. There are often exceptions and new discoveries
that may change the interpretation of data. Players should use
disagreements as an opportunity to research and learn more
about the solar system and to work together to arrive at a fair
conclusion.
Good to Know!
Asteroid—Large space rocks covered with craters. Most
asteroids orbit the Sun in the asteroid "belt" located between
Mars and Jupiter. Asteroids can be as small as a 200 m wide to as
big as 600 km wide.
Comet—A mixture of dust and ice that failed to form a planet.
Comets are often compared to “dirty snowballs.” Comets orbit
the Sun and become visible when the Sun's heat changes the
comet's ice into gas. The cores of comets can be as small as 3 km
wide and as big as 80 km wide. The tails of gas and dust coming
off comets can stretch for millions of kilometers in the solar wind.
Constellation—One of 88 groups, or regions, of stars that form
a pattern, or picture, in the sky.