1:1

Astronomy Channel Banner

A telescope under a starry sky.

Platform

Aspect ratio

Prompt for IG Square (1080 × 1080)

Tested on Google Flow

A wide banner image of a white telescope on a tripod on a hilltop under a dense starry sky with the Milky Way, a faint glow on the horizon, a dark empty band in the middle for the channel name. No text. Compose as square 1:1 for IG Square, with the main subject fully inside the frame and safe margin on every side.

Paste into Google Flow and pick the closest ratio in its settings. Finish exact sizes in the crop tool.

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How this image crops in each format. If a crop loses the subject, generate that ratio from the prompt above.

Crop this picture exactly, at full size, in the Crop Tool

About this prompt

We made the picture above with this prompt on Google Flow. It has a banner art style, night sky glow and a calm, curious mood, and it sits in the Channel Banners collection.

The frame is 16:9 (wide), and our original measures 1376 × 768 pixels. That shape is an exact fit for YouTube thumbnails, X posts and desktop wallpapers; LinkedIn posts and Facebook posts take it with a small crop. It was made with channel art in mind.

Style: Banner art
Lighting: Night sky glow
Mood: Calm, curious
Use case: Channel art

Made for:Channel Banners

Make this prompt your own

Subject: The opening words, “A wide banner image of a white telescope on a tripod on a hilltop under a dense starry sky with the Milky Way”, are the subject. Swap in your own subject and keep the rest to get a new picture in the same look.
Light: The light comes from the scene itself; our notes call it night sky glow. To change it, add a few words at the end, such as “bright flat light” or “dramatic light”.
Rules: “No text” at the end keeps stray letters out of the picture. Keep it, then put a title on top yourself if you need one.

Same theme, another look

In other light: Book Review Channel Banner (warm lamp light), Finance Channel Banner (clean studio light) and Photography Channel Banner (moody light).

In another style: Motivation Channel Banner (banner), Tech Channel Banner (channel art) and Neat Desk Study Banner (banner photo).

How to use this prompt

1Pick your platform or ratio at the top. The prompt rewrites itself for that size.
2Press Copy Prompt, open Google Flow and paste it. For this picture’s shape, pick 16:9 in its settings before you send.
3Make it yours: change the colours, place or product in the prompt’s words before you send it.
4Generate two or three times and keep the best. For an exact YouTube size, finish it in the Crop Tool.

Questions

Is this prompt free?

Yes. Copying the prompt is free for everyone. Signed-in visitors can also download the full-size image without a watermark, 10 images a day.

Will I get exactly this image?

Close, not identical. AI tools make a new picture every time, so the style, light and mood will match while faces and small details change. Run it a few times and pick the one you like.

Does it work outside Google Flow?

It was tested on Google Flow. It also works in ChatGPT and most other image tools, though results vary from tool to tool.

Which platforms is this size good for?

It was made in 16:9 (wide), which suits YouTube, X, LinkedIn, Facebook, Desktop Wallpaper. For any other size, choose it with the buttons at the top; the prompt and the crop preview change with it.

Can I use the image for my business?

What you make belongs under the rules of the AI tool you used, so check its terms first. Read our disclaimer before using images for ads or products.