Start Here.ipynb: sponsorship branding updates here

Start Here.ipynb

@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "![WorldWide Telescope logo](data/wwt-logo_stacked_406x158_black-on-transparent.png)\n",
+    "![WorldWide Telescope logo](data/horizontal-logomark_black-on-transparent_260x71.png)\n",
     "\n",
     "# Example notebooks for pywwt\n",
     "\n",
@@ -96,19 +96,16 @@
     "\n",
     "## Acknowledgments\n",
     "\n",
-    "The AAS WorldWide Telescope system is a [.NET Foundation] project managed by\n",
-    "the non-profit [American Astronomical Society] (AAS). Work on WWT has been\n",
-    "supported by the AAS, the US [National Science Foundation] (grants [1550701],\n",
-    "[1642446], and [2004840]), the [Gordon and Betty Moore Foundation], and [Microsoft].\n",
+    "The WorldWide Telescope project is fiscally sponsored by\n",
+    "[NumFOCUS](https://numfocus.org/). Consider making a [tax-deductible\n",
+    "donation](https://numfocus.org/donate-for-worldwide-telescope) to help support\n",
+    "the project. Work on WWT has been supported by the [American Astronomical\n",
+    "Society] (AAS), the [.NET Foundation], and other organizational partners. See\n",
+    "[the WWT user website][acks] for details.\n",
     "\n",
-    "[.NET Foundation]: https://dotnetfoundation.org/\n",
     "[American Astronomical Society]: https://aas.org/\n",
-    "[National Science Foundation]: https://www.nsf.gov/\n",
-    "[1550701]: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1550701\n",
-    "[1642446]: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1642446\n",
-    "[2004840]: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2004840\n",
-    "[Gordon and Betty Moore Foundation]: https://www.moore.org/\n",
-    "[Microsoft]: https://www.microsoft.com/\n"
+    "[.NET Foundation]: https://dotnetfoundation.org/\n",
+    "[acks]: https://worldwidetelescope.org/about/acknowledgments/\n"
    ]
   }
  ],
@@ -128,7 +125,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.9.18"
   }
  },
  "nbformat": 4,