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Library
What's new
STEM Icon Library
Free, downloadable PNG icons across biology, anatomy, chemistry, physics, and engineering. Browse 82,114 icons or search by topic.
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Biology
11,997
Anatomy
5,182
Physiology
6,576
Ecology
8,471
Cell Biology
1,215
Biochemistry
1,673
Chemistry
6,370
Physics
7,839
Astrophysics
4,976
Atmospheric Science
2,696
Oceanography
4,401
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4,740
Mechanical Engineering
4,524
Lab
4,636
Psychology
5,374
Other
1,444
Astrophysics
Optical depth tau lambda
Astrophysics
Optical depth tau lambda v
Astrophysics
Optical depth tau v
Astrophysics
Source function s lambda
Astrophysics
Intensity i lambda
Astrophysics
Intensity i
Astrophysics
Source function s
Astrophysics
Kappa lambda subscript
Astrophysics
Opacity kappa
Astrophysics
Density rho
Astrophysics
Onion cross section
Astrophysics
Stellar atmosphere plane parallel
Astrophysics
Eddington approximation intensity diagram
Astrophysics
Outward intensity arrow
Astrophysics
Inward intensity arrow
Astrophysics
Blackbody radiation glow
Astrophysics
Scientist portrait
Astrophysics
Star disk
Astrophysics
Emergent intensity beam
Astrophysics
Initial intensity beam
Astrophysics
Source function profile
Astrophysics
Optical depth scale
Astrophysics
Vertical axis arrow
Astrophysics
Plane parallel stellar atmosphere
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