Described as up to 15' tall & a likely nightmare at the local shoe store, this legend is basically North America's Yeti
Bigfoot
The 88 of these star groupings is a set number--new stars discovered are just added to the closest ones
constellations
"Something Just Like This" teamed Coldplay & this EDM duo whose name sounds like a very bad habit
The Chainsmokers
These quantities often represented by x & y are constantly changing, but Al can't live without 'em
variables
Da Nang,
Da Lat
Vietnam
Seism is an old-timey word for this geological event
an earthquake
Would you trust your dad to shoot an apple off your head using a bow & arrow? The son of this 14th century Swiss man had to
William Tell
An aphelion is the point in an orbit when an object is farthest from this
the Sun
Here's this singer & pal Keith Richards when they were barely out of their teens

Mick Jagger
***
ax2 + bx + c = 0 is the general form of this type of equation
the quadratic equation
Lugano, Lausanne
This word starting with "re" also means "revolution" & it's one letter shorter
rebellion
Head to Coventry & see the pageant that retraces the path that she took through town; unlike her, you can wear clothes
Lady Godiva
This planet has at least 13 moons, including Naiad, Nereid & Proteus
Neptune
"Walk It Talk It" did both for this hip-hop trio from Atlanta
Migos
*DAILY DOUBLE*
Al knows that this word for the 3 in 83 can also mean a person who advocates an idea
an exponent
Lagos,
Lafia
Nigeria
*DAILY DOUBLE*
This synonym for a news reporter & a person who keeps a diary comes to us partly from the French
a journalist
You'd find this 7-foot misnamed man in Sherwood Forest
Little John
On Sept. 20, 2016 an amateur astronomer got pictures of the first hour of one of these massive star explosions
Supernova
This singer with '80s hits like "Dress You Up" brought in Diplo & Chance the Rapper for her album "Rebel Heart"
Madonna
***
Al loves to play with these expressions from a word for "many", like 3x3 + 7y2 - 4z
polynomials
Beersheba,
Bat Yam
Israel
Instead of "global", you can use this more cosmic word for something that applies everywhere
universal
This end-of-the-alphabet vigilante of 19th century Calif. used 3 quick sword strokes to carve his favorite letter into his foes
Zorro
This measure of distance in the universe is equal to 3.26 light years
a parsec
Known for tunes like "Don't Happen Twice", this country singer hit the album sales chart with "Live in No Shoes Nation"
Kenny Chesney
***
Al knows he can make many a tough expression easier to work with by "completing" this
the square
Aarhus,
Aalborg
Denmark
This is a synonym for a great circle of longitude on the Earth, especially when it is "prime"
a meridian