Physics & Astronomy
dwarf galaxies
100%
galaxies
82%
star formation
72%
histories
39%
metallicity
38%
irregular galaxies
36%
stars
36%
Hubble Space Telescope
35%
Andromeda
31%
H II regions
27%
luminosity
21%
star formation rate
20%
color-magnitude diagram
17%
photometry
16%
starburst galaxies
16%
stellar mass
13%
metals
12%
helium
12%
gases
12%
spiral galaxies
10%
dust
10%
cameras
10%
oxygen
10%
neutral gases
10%
asymptotic giant branch stars
9%
gradients
9%
massive stars
8%
variable stars
8%
kinematics
7%
census
7%
estimates
7%
halos
6%
telescopes
6%
catalogs
6%
chemical evolution
6%
alfalfa
5%
star clusters
5%
spectrographs
5%
bursts
5%
compact galaxies
5%
spectroscopy
5%
brightness
5%
Andromeda Galaxy
5%
ionized gases
5%
wolves
5%
Earth & Environmental Sciences
luminosity
38%
history
30%
gas
22%
diagram
16%
metal
14%
helium
12%
oxygen
11%
dust
11%
rate
10%
spectroscopy
9%
young
9%
kinematics
8%
project
8%
near infrared
6%
young population
6%
extinction
5%
ionization
5%
census
5%
timescale
5%