11/07/1991. * Hace 30 años * 11/07/2021. Eclipse total de Sol en Costa Rica.

https://www.facebook.com/100000175752520/videos/403918707652219/

https://astronomia10norte.blogspot.com/2020/07/hace-29-anos-eclipse-total-de-sol-en.html

https://fisica1011tutor.blogspot.com/2016/07/hace-25-anos-eclipse-total-de-sol-11-de.html

https://fisica1011tutor.blogspot.com/2014/03/condiciones-para-que-ocurra-un-eclipse.html

https://fisica1011tutor.blogspot.com/2011/07/numero-36saros-136.html

https://cienteccrastro.blogspot.com/2009/07/hace-18-anos-11-dias-y-8-horas.html

https://cienteccrastro.blogspot.com/2008/08/eclipses-hermanos.html

https://cienciaiyiicr.blogspot.com/2015/05/influencia-del-sol-sobre-la-tierra.html

https://www.elpais.cr/2019/01/26/asociacion-costarricense-de-astronomia-30-anos/