Marble/C3/Celestial-Bodies-and-Constellations/English-timed
From Script | Spoken-Tutorial
| 00:01 | Welcome to this Spoken tutorial on Celestial Bodies and Constellations. |
| 00:05 | In this tutorial we will learn about,
Celestial bodies, Stars and constellations |
| 00:11 | Configure the setting of stars and constellations. |
| 00:15 | To record this tutorial, I am using, Ubuntu Linux OS version 16.04 |
| 00:23 | Marble version 1.12.20 and |
| 00:27 | A working internet connection |
| 00:30 | The process demonstrated is this tutorial is identical in, |
| 00:35 | Ubuntu Linux OS, version 18.04 |
| 00:38 | Marble version 2.2.20 |
| 00:43 | To practise this tutorial, learner should be familiar with Marble interface. |
| 00:48 | For the prerequisite Marble tutorials, please visit this site. |
| 00:53 | I have opened the Marble interface in the default Atlas view. |
| 00:58 | Let us zoom out to see the black sky. |
| 01:02 | I will hide Overview map, Compass and Scalebar for clarity. |
| 01:09 | Black coloured surface on the interface represents the sky on a clear night. |
| 01:15 | When we rotate the globe, we can see various objects present in the sky. |
| 01:21 | These objects are called celestial bodies. |
| 01:24 | We will now hide all the panels. |
| 01:27 | Go to the Settings menu and select Panels. |
| 01:30 | From the sub-menu select Hide All Panels. |
| 01:35 | To see more objects in the sky let us keep rotating the globe. |
| 01:40 | Notice that we can see sun, moon, stars and other celestial bodies. |
| 01:47 | Here we can see the countless bright stars in the sky. |
| 01:51 | The nearest star to the Earth is the Sun. |
| 01:54 | Our best estimates tell us that the Milky Way is made up of approximately 100 billion stars. |
| 02:01 | Let us now configure the settings for stars in the Marble interface |
| 02:06 | Click on the Settings menu. Select Configure Marble Virtual Globe option. |
| 02:12 | Configure window opens. |
| 02:14 | From the left panel, select the Plugins tab. |
| 02:17 | Plugins menu opens in the right panel. |
| 02:21 | At the extreme right of the Plugins menu we see a scroll bar. |
| 02:26 | Let us scroll down and locate Stars plugin. |
| 02:30 | Click on the Configure button corresponding to Stars. |
| 02:34 | Configure Stars Plugin window opens. |
| 02:38 | This window has two tabs, Celestial Objects and Lines and Orientation. |
| 02:46 | Celestial Objects tab opens by default. |
| 02:50 | In the Celestial Objects tab, we can see different sections. |
| 02:54 | Go to Star Magnitude Limit. |
| 02:57 | Star Magnitude Limit represents the magnitude of stars seen on the interface. |
| 03:03 | Under Star Magnitude Limit we can see a slider to change the magnitude. |
| 03:08 | Drag the slider to 0 magnitude. |
| 03:11 | Click on the OK button in the window. |
| 03:14 | Click on the OK button in the Configure window. |
| 03:17 | Notice that stars have disappeared from the interface. |
| 03:22 | Now we can clearly see the celestial bodies. |
| 03:25 | To open Configure Stars Plugin window, right-click anywhere on the black sky. |
| 03:31 | A context menu opens.. |
| 03:33 | Select Configure option from the menu. |
| 03:37 | In the Configure Stars Plugin window, next section is Solar System |
| 03:43 | This section has check-boxes for Sun, Moon and planets in the solar system. |
| 03:49 | Let us scroll down to see all the check-boxes. |
| 03:52 | By default, sun and moon check-boxes are checked. |
| 03:57 | We will check all the boxes to see the planets in the sky. |
| 04:01 | Observe that we cannot click on Earth check-box as we are observing from Earth. |
| 04:07 | Next we have two check-boxes. |
| 04:09 | Use name labels and Magnify Sun and Moon. |
| 04:14 | By default these check-boxes are checked. |
| 04:18 | These check-boxes are used to show the names of sun, moon and other planets. |
| 04:26 | Other section represents Deep Sky objects. |
| 04:30 | For now we will leave them as default. |
| 04:33 | Now click on the OK button in the window. |
| 04:36 | We can see some lines and shapes in the sky. They are constellations. |
| 04:41 | Let us see what are constellations. |
| 04:45 | A constellation is a group of stars which forms an imaginary shape in the night sky. |
| 04:51 | In Latin, Stella means a star and constellation means a set of stars. |
| 04:57 | Constellations are usually named after mythological characters, people, animals and objects. |
| 05:05 | It is like a game of connecting the dots. |
| 05:08 | The visible night sky is divided into 88 constellations by astronomers. |
| 05:14 | Out of which 12 are zodiac signs. |
| 05:18 | For better visibility, I will change the colour of the constellations. |
| 05:23 | To open Configure Stars Plugin window, right-click anywhere on the black sky. |
| 05:29 | Select Configure option from the context menu. |
| 05:33 | Configure Stars Plugin window opens. |
| 05:37 | Click on the Lines and Orientation tab. |
| 05:41 | Under Constellations, we can see two check-boxes, Lines and Labels. |
| 05:47 | Click on the button corresponding to Lines. |
| 05:50 | Colour window opens. |
| 05:53 | I will select yellow colour from the window. |
| 05:%7 | Click on the OK button in the window. |
| 06:00 | Next click on the button corresponding to Labels. |
| 06:04 | From the colour window I will select red colour. |
| 06:08 | Click on the OK button in the color window. |
| 06:11 | Below Labels we can see Names drop-down. |
| 06:15 | In the drop-down, Latin Name is selected by default. |
| 06:19 | I will leave it as it is. |
| 06:22 | Next is the Coordinate Grid section. |
| 06:25 | Under the Coordinate Grid, we see Celestial Equator, Celestial Poles and Ecliptic check-boxes. |
| 06:33 | I will leave them as default. |
| 06:36 | Now let us make the stars visible on the interface. |
| 06:40 | Click on the Celestial Objects tab. |
| 06:43 | Under Star Magnitude Limit , drag the slider to 7 magnitude. |
| 06:48 | Now click on the OK button in the window. |
| 06:51 | We can see the changes in the Lines and Labels of each constellation. |
| 06:56 | Rotate the globe to see the various zodiac signs. |
| 07:04 | Let us summarise. |
| 07:06 | In this tutorial we have learnt about
Celestial bodies, Stars and constellations, Configure the settings of stars and constellations |
| 07:17 | As an assignment
Explore more about Coordinate Grid option. |
| 07:22 | Hint: Use Celestial Objects tab in Stars plugin. |
| 07:27 | The video at the following link summarizes the Spoken Tutorial project.
Please download and watch it. |
| 07:34 | The Spoken Tutorial Project team: conducts workshops using spoken tutorials and gives certificates.
For more details, please write to us. |
| 07:43 | Please post your timed queries in this forum. |
| 07:47 | Spoken Tutorial Project is funded by, MHRD, Government of India. |
| 07:52 | This tutorial is contributed by Viji Nair and Madhuri Ganapathi from IIT Bombay. Thank you for watching. |
