WHEN YOU LOOK AT THE STARS YOU SEE SPECKS# OF TWINKLY LIGHT, BUT IF YOU LOOK A LITTLE LONGER .

THEY COME IN A VARIETY OF COLORS -# RED, BLUE, YELLOW, ORANGE AND WHITE (OF COURSE).

FIND THE BIG DIPPER, THIS WEEK AROUND TEN PM.# WHEN WE FOLLOW THE ARC OF THE HANDLE WE GET TO ARCTURUS IN BOOTES.

ARCTURUS IS AN ORANGE# STAR, WHICH TELLS US IT’S A COOL 4,300 KELVIN.

IF WE SPIKE FROM ARCTURUS TO SPICA, WE’LL SEE A VERY DIFFERENT COLOR - BLUE!# WHY?

BECAUSE IT’S A VERY HOT 26,000 KELVIN!

NOW LOOK SOUTH TO ANTARES IN SCORPIUS - THIS ONE IS RED!

IT’S AN EVEN COOLER# SUPERGIANT AT ABOUT 3,500 KELVIN.

FINALLY, HOP TO THE SUMMER TRIANGLE IN# THE EAST.

ALTAIR IN AQUILA IS YELLOW WHITE AT 7800 KELVIN, AND VEGA IS# PERFECTLY WHITE AT 9800 KELVIN.

ALL THIS MATTERS BECAUSE ASTRONOMERS USE# COLOR AS ONE MORE DATA POINT ABOUT ALL THE STARS WE CAN SEE IN THE SKY.

CAN YOU SEE# MORE COLORS OUT THERE?

KEEP LOOKIN’ UP!