Noun Project

Tornado by Bart Laubsch
Alien Abduction by Bart Laubsch
Hurricane by icon 54 from
Smashicons Space by Ben Davis
Space 2 - Solid by Ben Davis
Filter by Karthik Aathis 
Search by il Capitano
Resize by Costa Galaktionov
mask by Felipe Alvarado
Asterisk by mikicon
chevron by useiconic.com
Heat by Alexander Skowalsky
Mouse Left Click by Benjamin Sommerlad
right by ImageCatalog
Blur by Rohith M S
Lightning Bolt by Daniel Leonard
spiral by Joel McKinney
spiral by Rflor
Origami by art shop
Flower by Nikita Kozin
Wind by Focus Lab
storm cloud by Focus Lab
Flower by Focus Lab
falling drop by Angelo Troiano
technical thinking by Vectors Market
Seahorse by Icons Producer 
Owl by Vectors Market
Lotus by Cass Reese
interlaced unicursal hexagram by Avana Vana
wing by prasong tadoungsorn
wings by iejank 
Fire by Bohdan Burmich
Hex Grid by Adam Robinson
solar system by Made by Made
Planet by Paul Krizsan
Planet by Eliricon
Planet by Vicons Design
Moon by Smalllike
spaceship by Thomas
origami bird by bjkow
knowledge by Erik Arndt
Resize by iconesia

Other

Asteroids by lodetobback