minor tweaks

Author: adrn

tutorials/astropy-coordinates/3-Coordinates-Velocities.ipynb

@@ -58,7 +58,6 @@
     "import matplotlib.pyplot as plt\n",
     "%matplotlib inline\n",
     "import numpy as np\n",
-    "!pip install \"astroquery\"\n",
     "\n",
     "from astropy import units as u\n",
     "from astropy.coordinates import SkyCoord, Distance, Galactic\n",
@@ -96,22 +95,12 @@
    "outputs": [],
    "source": [
     "SkyCoord(\n",
-    "    ra=10*u.deg, \n",
+    "    ra=10*u.deg,\n",
     "    dec=20*u.deg,\n",
     "    pm_ra_cosdec=1*u.mas/u.yr,\n",
     "    pm_dec=2*u.mas/u.yr)"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "metadata": {
-    "id": "v6EeE4KsfSpq"
-   },
-   "source": [
-    "**Thought Questions:**\n",
-    "What value did we put in for our right ascension? What about our declination? What units are they in?"
-   ]
-  },
   {
    "cell_type": "markdown",
    "metadata": {
@@ -132,7 +121,7 @@
    "outputs": [],
    "source": [
     "SkyCoord(\n",
-    "    ra=np.linspace(0, 10, 5)*u.deg, \n",
+    "    ra=np.linspace(0, 10, 5)*u.deg,\n",
     "    dec=np.linspace(5, 20, 5)*u.deg,\n",
     "    pm_ra_cosdec=np.linspace(-5, 5, 5)*u.mas/u.yr,\n",
     "    pm_dec=np.linspace(-5, 5, 5)*u.mas/u.yr)"
@@ -158,7 +147,7 @@
    "outputs": [],
    "source": [
     "velocity_coord = SkyCoord(\n",
-    "    ra=10*u.deg, \n",
+    "    ra=10*u.deg,\n",
     "    dec=20*u.deg,\n",
     "    pm_ra_cosdec=1*u.mas/u.yr,\n",
     "    pm_dec=2*u.mas/u.yr,\n",
@@ -272,7 +261,7 @@
     "# This cell will NOT work (you will receive an ConvertError warning) - this is expected!\n",
     "\n",
     "test_coord_1 = SkyCoord(\n",
-    "    ra=10*u.deg, \n",
+    "    ra=10*u.deg,\n",
     "    dec=20*u.deg,\n",
     "    pm_ra_cosdec=1*u.mas/u.yr,\n",
     "    pm_dec=2*u.mas/u.yr)\n",
@@ -298,7 +287,7 @@
    "outputs": [],
    "source": [
     "test_coord_2 = SkyCoord(\n",
-    "    ra=10*u.deg, \n",
+    "    ra=10*u.deg,\n",
     "    dec=20*u.deg,\n",
     "    distance=10*u.pc,\n",
     "    pm_ra_cosdec=1*u.mas/u.yr,\n",
@@ -332,7 +321,7 @@
    "outputs": [],
    "source": [
     "# Skip this cell if you are not connected to the internet\n",
-    "gaia_tbl = Gaia.query_object(SkyCoord.from_name('HD 219829'), \n",
+    "gaia_tbl = Gaia.query_object(SkyCoord.from_name('HD 219829'),\n",
     "                             radius=1*u.arcmin)"
    ]
   },
@@ -350,9 +339,9 @@
    "outputs": [],
    "source": [
     "# the .read() below produces some warnings that we can safely ignore\n",
-    "with warnings.catch_warnings(): \n",
+    "with warnings.catch_warnings():\n",
     "    warnings.simplefilter('ignore', UserWarning)\n",
-    "    \n",
+    "\n",
     "    gaia_tbl = QTable.read('HD_219829_query_results.ecsv')"
    ]
   },
@@ -397,7 +386,7 @@
    "outputs": [],
    "source": [
     "hd219829_coord = SkyCoord(\n",
-    "    ra=hd219829_row['ra'], \n",
+    "    ra=hd219829_row['ra'],\n",
     "    dec=hd219829_row['dec'],\n",
     "    distance=Distance(parallax=hd219829_row['parallax']),\n",
     "    pm_ra_cosdec=hd219829_row['pmra'],\n",
@@ -466,7 +455,7 @@
     "hdu = fits.open(dss_cutout_filename)[0]\n",
     "wcs = WCS(hdu.header)\n",
     "\n",
-    "fig, ax = plt.subplots(1, 1, figsize=(8, 8), \n",
+    "fig, ax = plt.subplots(1, 1, figsize=(8, 8),\n",
     "                       subplot_kw=dict(projection=wcs))\n",
     "ax.imshow(hdu.data, origin='lower', cmap='Greys_r')\n",
     "ax.set_xlabel('RA')\n",
@@ -520,9 +509,9 @@
    "outputs": [],
    "source": [
     "# this produces some warnings that we can safely ignore\n",
-    "with warnings.catch_warnings(): \n",
+    "with warnings.catch_warnings():\n",
     "    warnings.simplefilter('ignore', UserWarning)\n",
-    "    \n",
+    "\n",
     "    hd219829_coord_1950 = hd219829_coord.apply_space_motion(\n",
     "        new_obstime=Time('J1950'))"
    ]
@@ -544,7 +533,7 @@
    },
    "outputs": [],
    "source": [
-    "fig, ax = plt.subplots(1, 1, figsize=(8, 8), \n",
+    "fig, ax = plt.subplots(1, 1, figsize=(8, 8),\n",
     "                       subplot_kw=dict(projection=wcs))\n",
     "ax.imshow(hdu.data, origin='lower', cmap='Greys_r')\n",
     "ax.set_xlabel('RA')\n",
@@ -616,11 +605,6 @@
    "name": "3-Coordinates-Velocities.ipynb",
    "provenance": []
   },
-  "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
-   "language": "python",
-   "name": "python3"
-  },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
@@ -630,8 +614,7 @@
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.9.12"
+   "pygments_lexer": "ipython3"
   }
  },
  "nbformat": 4,