alleysannoysalloysbaysboysbuoysbuysdaysdestroysguyskeysmonkeyspayspulleysploysplaysraysreplaysstraysturkeysvalleysvolleysways
The meteor came from another star systemand crashed into our Moon.
There are lots of such words. I suggest you either read an introductory article on Astronomy, for example on Wikipedia; or do a Google search for "Astronomy glossary".
Some words do not have opposites. Astronomy is one of them.
astronomy
9
Math & astronomy.
Some words that have 2 Ys in them are:anonymityanybodyanywayasymmetryboysenberrybuoyancybusybodybyplaybywaycrybabycryptographycytologyday lilydilly dallydynastydysenteryetymologyeverybodyeverydayflybyflywaygypsyhokey pokeyholy dayhyperactivityhypocrisyichthyologyidiosyncrasylayawayloyaltymisogynymysterymystifymythologynaysayerodysseypaydayplayboypolygamypolypropylenepolystyrenepsychiatrypsychologypygmyroyaltysymmetrysympathysynonymsyrupytypifytypographytyrannywaylayyearlyyeastyyesterdayyesteryearyuckyyummyzymurgy
Asteroid is one.
Ys - series - was created in 1987.
Ys Strategy happened in 2006.
Ys Origin was created in 2006.