What is the software to watch the stars for free?

Using Google Star software can meet your requirements.

Google Sky Map is a starry sky observation software launched by Google. It can make your Android phone a window to look at the night sky.

1, real-time display of starry sky:

Open Google Starsky and you will see the starry sky where the mobile phone is located. Swing the direction of the mobile phone, you can see the starry sky in different sky positions. When the phone is horizontally down, you can see the "bottom of the sky", which is the starry sky under your feet. When the mobile phone is horizontally upward, you can see the sky overhead, which is the "zenith". By the same token, you can see the north by pointing the mobile phone vertically to the north, and so can other directions.

2, mobile phone to enjoy the moon

At the full moon in May, raise your mobile phone and point it at the sky, and the moon will be displayed immediately. Now, you can find the moon even in the daytime. Click the menu button, select Search, and enter the keyword "Moon" in the search box. Google Star will display a circular arrow on the screen to indicate the location, adjust the angle of the phone, and easily find the moon.

Step 3 look for constellations

This year's Mid-Autumn Festival is September 27th, and it is also a Virgo. You can find the constellation by searching Virgo in Google Sky (Virgo can't search).

4. Time travel

Li Bai's Thoughts on a Quiet Night is a well-known poem. Of course, the starry sky that Li Bai saw was different from what it is now. Want to know what starry sky Li Bai saw? Time travel can travel through the past and see the future.