If you likes the Sun, don't miss this beautiful resource of images and movies about the closest star to the Earth planet!

There are many incredible phenomena on the Sun, not all of them are visible in the optical band: most of them are accessible in the ultraviolet region of the electromagnetic spectrum.

https://sdo.gsfc.nasa.gov/

#astroservices

At the first step in the amateur astronomy you can't miss the knowledge of the sky and its constellations.

So, a beautiful starting point is Stellarium Web Star Map.

With this service you can see in your browser the nightsky at your location, artificial satellites, planets, the Moon and all the principal periodical comets transiting in this season.

https://stellarium-web.org/

#astroservices

The Virtual Observatory is a great service for all of amateur astronomers and scientists in related fields.

My first reference for astronomical images is the SkyView, then the image service of PanSTARRS, and finally the Legacy Survey Archive.

https://skyview.gsfc.nasa.gov/current/cgi/titlepage.pl
http://ps1images.stsci.edu/cgi-bin/ps1cutouts
https://www.legacysurvey.org/

#astroservices

Subject: planetary nebula
Name: IC 351
Best Equatorial Coordinates (J2000): 56.8876667, 35.0466389

http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=IC+351&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: PanSTARRS; Kohoutek 2001 "Catalogue of Galactic Planetary Nebulae"

#planetarynebulae
#astroservices

Subject: planetary nebula
Name: M 1-4
Best Equatorial Coordinates (J2000): 55.4305833, 52.2835

http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=55.4305833+%2C+52.2835&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=120&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: PanSTARRS; Kohoutek 2001 "Catalogue of Galactic Planetary Nebulae"

#planetarynebulae
#astroservices

Subject: planetary nebula
Name: K 3-94
Best Equatorial Coordinates (J2000): 54.032375, 60.0622222

http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=54.032375+%2C+60.0622222&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=120&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: PanSTARRS; Kohoutek 2001 "Catalogue of Galactic Planetary Nebulae"

#planetarynebulae
#astroservices

Subject: planetary nebula
Name: IC 289
Best Equatorial Coordinates (J2000): 47.58025, 61.3167778

http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=47.58025+%2C+61.3167778&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: PanSTARRS; Kohoutek 2001 "Catalogue of Galactic Planetary Nebulae"

#planetarynebulae
#astroservices

Subject: planetary nebula
Name: IC 1747
Best Equatorial Coordinates (J2000): 29.399375, 63.3218889

http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=29.399375+%2C+63.3218889&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: PanSTARRS; Kohoutek 2001 "Catalogue of Galactic Planetary Nebulae"

#planetarynebulae
#astroservices

Subject: planetary nebula
Name: BV 3
Best Equatorial Coordinates (J2000): 28.26, 56.4055556

http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=28.26+%2C+56.4055556&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: PanSTARRS; Kohoutek 2001 "Catalogue of Galactic Planetary Nebulae"

#planetarynebulae
#astroservices

Subject: spiral galaxy
Project: morphology, stratigraphy and stellar populations
Name (SDSS DR7 ID): 588009365861498889
Equatorial Coordinates (J2000): 136.796234, 50.712746
https://skyview.gsfc.nasa.gov/userimages/skv28758476236198.html
https://skyview.gsfc.nasa.gov/userimages/skv28758259748202.html
https://skyview.gsfc.nasa.gov/userimages/skv28758288809622.html
https://skyview.gsfc.nasa.gov/userimages/skv28758571246219.html
https://skyview.gsfc.nasa.gov/userimages/skv28758330292344.html
https://skyview.gsfc.nasa.gov/userimages/skv28758613203588.html
http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=136.796234+%2C+50.712746&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: SDSS-g, SDSS-r, SDSS-i, PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: SkyView; PanSTARRS; Hart 2016 "Galaxy Zoo 2: new classification"

#spiralgalaxies
#astroservices

Subject: spiral galaxy
Project: morphology, stratigraphy and stellar populations
Name (SDSS DR7 ID): 587729652349141047
Equatorial Coordinates (J2000): 249.135696, 39.027874
https://skyview.gsfc.nasa.gov/userimages/skv28687919254975.html
https://skyview.gsfc.nasa.gov/userimages/skv28687708669470.html
https://skyview.gsfc.nasa.gov/userimages/skv28687739891097.html
https://skyview.gsfc.nasa.gov/userimages/skv28688044429752.html
https://skyview.gsfc.nasa.gov/userimages/skv28688067829908.html
https://skyview.gsfc.nasa.gov/userimages/skv28688098671696.html
http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=249.135696+%2C+39.027874&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: SDSS-g, SDSS-r, SDSS-i, PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: SkyView; PanSTARRS; Hart 2016 "Galaxy Zoo 2: new classification"

#spiralgalaxies
#astroservices

Subject: spiral galaxy
Project: morphology, stratigraphy and stellar populations
Name (SDSS DR7 ID): 587733604267131173
Equatorial Coordinates (J2000): 245.818939, 39.919876
https://skyview.gsfc.nasa.gov/userimages/skv28685261638307.html
https://skyview.gsfc.nasa.gov/userimages/skv28685642083993.html
https://skyview.gsfc.nasa.gov/userimages/skv28685661193165.html
https://skyview.gsfc.nasa.gov/userimages/skv28685712980923.html
https://skyview.gsfc.nasa.gov/userimages/skv28685761451332.html
https://skyview.gsfc.nasa.gov/userimages/skv28685527883715.html
http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=245.818939+%2C+39.919876&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: SDSS-g, SDSS-r, SDSS-i, PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: SkyView; PanSTARRS; Hart 2016 "Galaxy Zoo 2: new classification"

#spiralgalaxies
#astroservices

Subject: spiral galaxy
Project: morphology, stratigraphy and stellar populations
Name (SDSS DR7 ID): 588018056733130844
Equatorial Coordinates (J2000): 240.668961, 37.359493
https://skyview.gsfc.nasa.gov/userimages/skv28671819153058.html
https://skyview.gsfc.nasa.gov/userimages/skv28671927612260.html
https://skyview.gsfc.nasa.gov/userimages/skv28671954604095.html
https://skyview.gsfc.nasa.gov/userimages/skv28671987639332.html
https://skyview.gsfc.nasa.gov/userimages/skv28672026335482.html
https://skyview.gsfc.nasa.gov/userimages/skv28672052935657.html
http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=240.668961+%2C+37.359493&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: SDSS-g, SDSS-r, SDSS-i, PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: SkyView; PanSTARRS; Hart 2016 "Galaxy Zoo 2: new classification"

#spiralgalaxies
#astroservices

Subject: spiral galaxy
Project: morphology, stratigraphy and stellar populations
Equatorial Coordinates (J2000): 186.251953, 28.55859
https://skyview.gsfc.nasa.gov/userimages/skv28646122149820.html
https://skyview.gsfc.nasa.gov/userimages/skv28645977097641.html
https://skyview.gsfc.nasa.gov/userimages/skv28645996551127.html
https://skyview.gsfc.nasa.gov/userimages/skv28646019339847.html
https://skyview.gsfc.nasa.gov/userimages/skv28646316271271.html
https://skyview.gsfc.nasa.gov/userimages/skv28646082529476.html
http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=186.251953+%2C+28.55859&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: SDSS-g, SDSS-r, SDSS-i, PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: SkyView; PanSTARRS; Hart 2016 "Galaxy Zoo 2: new classification"

#spiralgalaxies
#astroservices

Subject: spiral galaxy
Project: morphology, stratigraphy and stellar populations
Equatorial Coordinates (J2000): 135.084396, 52.49424
https://skyview.gsfc.nasa.gov/userimages/skv28596521502698.html
https://skyview.gsfc.nasa.gov/userimages/skv28596390020564.html
https://skyview.gsfc.nasa.gov/userimages/skv28596684614813.html
https://skyview.gsfc.nasa.gov/userimages/skv28596526654456.html
https://skyview.gsfc.nasa.gov/userimages/skv28596546688466.html
https://skyview.gsfc.nasa.gov/userimages/skv28596566028212.html
http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=135.084396+%2C+52.49424&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: SDSS-g, SDSS-r, SDSS-i, PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: SkyView; PanSTARRS; Hart 2016 "Galaxy Zoo 2: new classification"

#spiralgalaxies
#astroservices

Subject: spiral galaxy
Project: morphology, stratigraphy and stellar populations
Name (SDSS DR7 ID): 587732591714893851
Equatorial Coordinates (J2000): 179.042984, 60.522518
https://skyview.gsfc.nasa.gov/userimages/skv28570543145737.html
https://skyview.gsfc.nasa.gov/userimages/skv28570765113732.html
https://skyview.gsfc.nasa.gov/userimages/skv28571419904979.html
https://skyview.gsfc.nasa.gov/userimages/skv28571482053354.html
https://skyview.gsfc.nasa.gov/userimages/skv28571519759078.html
https://skyview.gsfc.nasa.gov/userimages/skv28571833678301.html
http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=179.042984+%2C+60.522518&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: SDSS-g, SDSS-r, SDSS-i, PS1-g, PS1-r, PS1-i, PS1-z, PS1-y
Credits: SkyView; PanSTARRS; Hart 2016 "Galaxy Zoo 2: new classification"

#spiralgalaxies
#astroservices

Subject: supernova remnant
Name: G004.2-03.5
Best Equatorial Coordinates (J2000): 18:08:50.50, -27:09:49.3
https://skyview.gsfc.nasa.gov/userimages/skv28084601764960_25.html
https://skyview.gsfc.nasa.gov/userimages/skv28084601764960_24.html
https://skyview.gsfc.nasa.gov/userimages/skv28084601764960_23.html
https://skyview.gsfc.nasa.gov/userimages/skv28084601764960_22.html
https://skyview.gsfc.nasa.gov/userimages/skv28084601764960_16.html
https://skyview.gsfc.nasa.gov/userimages/skv28084601764960_14.html

Spectral bands: radio.
Credits: SkyView; Green 2019 "A Catalogue of Galactic Supernova Remnants"

#supernovaremnants
#astroservices

Subject: supernova remnant
Name: G001.9+00.3
Best Equatorial Coordinates (J2000): 267.1875, -27.1667
https://skyview.gsfc.nasa.gov/userimages/skv28067700534048_1.html
https://skyview.gsfc.nasa.gov/userimages/skv28067700534048_2.html
https://skyview.gsfc.nasa.gov/userimages/skv28067700534048_14.html
https://skyview.gsfc.nasa.gov/userimages/skv28067700534048_16.html
https://skyview.gsfc.nasa.gov/userimages/skv28067700534048_17.html
https://skyview.gsfc.nasa.gov/userimages/skv28067700534048_19.html

Spectral bands: X, radio.
Credits: SkyView; Green 2019 "A Catalogue of Galactic Supernova Remnants"

#supernovaremnants
#astroservices

Subject: planetary nebula
Name: NGC 650
Best Equatorial Coordinates (J2000): 25.582040, 51.575470

http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=ngc+650&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=720&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: PS1-g, PS1-r, PS1-i, PS1-z, PS1-y

#planetarynebulae
#astroservices

Subject: planetary nebula
Name: M 1-1
Best Equatorial Coordinates (J2000): 24.3302917, 50.4699167

http://ps1images.stsci.edu/cgi-bin/ps1cutouts?pos=24.3302917+%2C+50.4699167&filter=color&filter=g&filter=r&filter=i&filter=z&filter=y&filetypes=stack&auxiliary=data&size=240&output_size=0&verbose=0&autoscale=99.500000&catlist=

Spectral bands: PS1-g, PS1-r, PS1-i, PS1-z, PS1-y

#planetarynebulae
#astroservices