Terms of use
Last updated 9 November 2026
These terms apply to the Solar Lab at stardustastronomy.com/solar-lab, run by Stardust Astronomy (Vishal Sharma), India. By creating an account you agree to them.
1. Accounts
You need an account with a valid email address and a password to use the Solar Lab. Keep your password private; you are responsible for activity on your account. One person or organisation per account.
2. Free images
Each email address may analyse 10 images free of charge. This allowance is given once and does not reset. An image counts when it is added and analysed; adding the same file again does not count again. The sample image on the page is not counted. Creating extra accounts to get more free images is not allowed.
3. Subscriptions and prices
After the free images, a subscription gives unlimited use for the period paid for: ₹1,000 for one month or ₹8,000 for one year. Payments through Razorpay are charged in Indian rupees. Payments through PayPal are charged in US dollars at the amount shown before you pay. All prices are final: no taxes, gateway or bank charges are added at checkout. Subscriptions are prepaid and do not renew automatically; we email you before your period ends. If you renew early, the new period starts when the current one ends.
4. Invoices
A PDF invoice is emailed to you after each payment and is available in your account. The invoice shows the name and postal address you enter as billing details. Stardust Astronomy is not registered under GST, so no GST is charged or shown.
5. Cancellation and refunds
See the refund policy. In short: you can stop at any time by not renewing, access continues until the end of the paid period, and payments are not refunded once a period has started, except for duplicate or failed charges.
6. Your images
Images are analysed in your own browser. If you keep “Save my images and results to my account” ticked, the original file and your results are stored privately in your account (My library) so you can reopen them; you can switch this off or delete them at any time. You keep all rights to your images and to the files you download. See the privacy policy for what we store.
7. Accuracy
Measurements, solar orientation (P and B0 angles), scales, heights, areas, detections and derived images are calculated automatically and are estimates. They depend on the image, its processing and the observation time. The Solar Lab is a tool for education, outreach and amateur research; check important results against a professional reference such as GONG or SDO before you publish or rely on them. Stardust Astronomy is not liable for decisions made from the results.
8. Fair use
Do not try to break, overload or reverse-engineer the service, share your account, or use it for anything unlawful. We may suspend accounts that do.
9. Changes
We may update these terms or prices. Changes do not affect a period you have already paid for. The current version is always on this page.
10. Law
These terms are governed by the laws of India. Courts in Gautam Buddh Nagar, Uttar Pradesh have jurisdiction.
Contact
Stardust Astronomy (Vishal Sharma), Greater Noida West, Uttar Pradesh, India. Reply to any Solar Lab email, call +91 99996 92985 or message on WhatsApp.