Astronomical functions are accessible from "Astronomy" menu. (See Using Starlogin

A star chart observed from a given place at a given date can be calculated from submenu "Star chart" of menu "Astronomy".

In the corresponding window, you can select the direction toward which the observer looks at the sky:

Click on "Horizon" to see the sky above the horizon.

Click on "Zenith" to see the sky towards Zenith.

You can also:

• Display the coordinates of the planets by checking the "Coordinates" checkbox.
• Display the constellations by checking the "Constellations" checkbox.
• Display the hours of rise and set of planets by clicking on the "Rise and Set" button.
• Calculate the distances and the apparent angles between the planets by clicking on the "Distances " button.
• Display more or less stars by checking the "Stars" check box and then moving the slider on the right.
• Display the sky under your feet (and hidden by the Earth) by checking "Other Side".
• Display or not the asteroids by checking the "Asteroids" check box.
• Animate the chart with a given step (one hour, one day...) by clicking on "Animation" and then one of the triangle buttons.

Etc.

The position of an asteroid is calculated from "Asteroids" submenu of "Astronomy" menu.

In the asteroids window, select the wanted asteroid name, enter the date, the hour, the observation place name and coordinates, then click on "Calculate" to obtain the asteroid position, in the current coordinates system (see. Coordinates system choice)

It is possible to add an asteroid into the list, to remove one from it, or even to modify the relating data to an asteroid. To do this, proceed as for events (See Database and files)

The position of a periodical comet is calculated from "Comets" submenu of "Astronomy" menu.

In the comets window, select the wanted comet name, enter the initial observation date and hour, the final date and hour, the observation place name and coordinates, then click on "Calculate" to obtain the successive comet positions for the observation duration, in the current coordinates system (see. Coordinates system choice)

It is possible to add a comet into the list, to remove one from it, or even to modify the relating data to a comet. To do this, proceed as for events (See Database and files)

Stars position for the date of the current astrological event is calculated from "Stars" submenu of "Astronomy" menu.

The calculation is done for the current coordinates system (see. Coordinates system choice), and for the current event place. All the stars whose visual or photovisual magnitude (the difference between the two magnitude types is negligible) is less than the current limit magnitude (see. Every user options selection) are taken in account for the displayed results.

A planet perihelion and aphelion crossing dates are calculated from "Perihelion and aphelion" submenu of "Astronomy" menu.

In the corresponding window, enter the supposed close year to the searched dates and select the wanted planet for calculation, before validating.

A planet ascending node and descending one dates are calculated from "Crossing nodes" submenu of "Astronomy" menu.

In the corresponding window, enter the supposed close year to the searched dates and select the wanted planet for calculation, before validating.

The phase and the age of the Moon at a given date are calculated from " Moon phases and ages" submenu of "Astronomy" menu.

In the corresponding window, enter the date and the hour of the moment for which you want to know the phase and the lunar age, before validating.

The solar and lunar eclipses during a considered year are calculated from "Eclipses" submenu of "Astronomy" menu.

In the corresponding window, enter the year for which you want to know the solar and lunar eclipses dates, before validating.

Validating allows to obtain the first eclipse date in the considered year. To obtain the next year, click on the "Next" button. Etc until the "Next" button becomes "END".

Solstices and equinoxes dates

The dates of each solstice and equinox (or seasons in other words) during a considered year are calculated from "Solstices and equinoxes" submenu of "Astronomy" menu.

In the corresponding window, enter the year for which you want to know the seasons, before validating.