change URL text

update the URL text for this link

(but secretly just changing the markdown in an attempt to trigger a refresh of this page)

Author: ttdu

notebooks/SDSS/sdss.md

@@ -6,7 +6,7 @@ The Sloan Digital Sky Survey (SDSS) is an international collaboration producing
 ## For Further Reading
 The [SDSS Legacy Archive at MAST User Manual](https://outerspace.stsci.edu/display/SDSS/The+SDSS+Legacy+Archive+at+MAST) website contains summary information, data product overviews, descriptions of MAST tools, and tutorials on how to interact with SDSS data at MAST.
 
-For more general information relating to SDSS, the documentation is available at [www.sdss.org](https://www.sdss.org)
+For more general information relating to SDSS, the documentation is available on [the SDSS homepage](https://www.sdss.org)
 
 
 
@@ -21,4 +21,4 @@ For more general information relating to SDSS, the documentation is available at
 | [SDSS Legacy Imaging Survey and Gaia Tutorial](https://spacetelescope.github.io/mast_notebooks/notebooks/SDSS/SDSS_LEGACY_IMAGING_cmd/cmd_diagram.html) | Tutorial for how to search and download SDSS Legacy Imaging Survey data and Gaia data from MAST. Calculating the age of M13 with Color-Magnitude Diagrams using parallax from Gaia and stellar isochrones from the PARSEC database. |
 | [SDSS Legacy Imaging Survey and Astrocut Tutorial](https://spacetelescope.github.io/mast_notebooks/notebooks/SDSS/SDSS_LEGACY_IMAGING_galaxy_morphology/galaxy_morphology.html) | Tutorial for how to search and download SDSS Legacy Imaging Survey data from MAST and use the `Astrocut` Python package. Creating a Hubble Tuning Fork Diagram with cutout images to understand galaxy morphology. |
 
-More SDSS notebooks will be coming soon!
+More SDSS notebooks will be coming soon!