Category:Published

February 2, 2020

Glass Bead Bow – OPOD – Optics Picture of the Day

If one day you are walking and you realize that your shadow has a halo, do not panic, it has an explanation. One of...

December 25, 2018

My photographs in the book The Ultimate Guide to Stargazing

Finally, the book The Ultimate Guide to Stargazing was published by the Australian author Gregg D Thompson. I have had the pleasure of contributing with my...

March 4, 2018

APOD 2018

CLOUDS, BIRDS, MOON, VENUS again in the NASA Astronomy Picture of the Day This image has been selected again as NASA APOD. Here you...

June 1, 2015

Baltic Halos – OPOD – Optics Picture of the Day

Today in Optics Picture of the Day my Baltic Halos

May 12, 2013

APOD 2013

NASA Astronomy Picture of the Day

September 15, 2010

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.

Necessary

Always Enabled

Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.

Cookie	Duration	Description
cookielawinfo-checbox-analytics	11 months	This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checbox-functional	11 months	The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checbox-others	11 months	This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-advertisement	1 year	The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Advertisement".
cookielawinfo-checkbox-necessary	11 months	This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-performance	11 months	This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy	11 months	The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.

Functional

Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.

Cookie	Duration	Description
_icl_visitor_lang_js	1 day	This cookie is stored by WPML WordPress plugin. The purpose of the cookie is to store the redirected language.
wpml_browser_redirect_test	session	This cookie is set by WPML WordPress plugin and is used to test if cookies are enabled on the browser.

Performance

Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.

Cookie	Duration	Description
_first_pageview	10 minutes	This is a session cookie set during the first display of the page on each visit. This cookie is used to shoot certain codes on the first display of the page and also to enhance the speed of the website.
YSC	session	This cookies is set by Youtube and is used to track the views of embedded videos.

Analytics

Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.

Cookie	Duration	Description
_jsuid	1 year	This cookie contains random number which is generated when a visitor visits the website for the first time. This cookie is used to identify the new visitors to the website.
cluid	1 year	This cookie is used for websites which is having multiple domains to identify the same visitor across multiple domains.
vuid	2 years	This domain of this cookie is owned by Vimeo. This cookie is used by vimeo to collect tracking information. It sets a unique ID to embed videos to the website.

Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.

Cookie	Duration	Description
VISITOR_INFO1_LIVE	5 months 27 days	This cookie is set by Youtube. Used to track the information of the embedded YouTube videos on a website.

Others

Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.

Cookie	Duration	Description
CONSENT	16 years 8 months 3 days 4 hours 12 minutes	No description
unpoco_101263363	1 day	No description