Astronomical twilight is the darkest phase of twilight that a viewer sees before the last refracted sunlight leaves the horizon. It usually occurs twice a day. Source Share: Previous Post Germany: The Plug-In Car Sales Decrease Deepened In April 2022 Next Post Best lights that support Google Assistant 2022 Related Articles Space HBO’s ‘Westworld’ is returning for season 4 and here’s a trailer for your sci-fi needs Space Lego space deals: discounts on spaceships, space stations and NASA kits Space UK Lego Star Wars deal: Save 20% on the UCS Imperial Star Destroyer at John Lewis Space Nikon binoculars: Deals and discounts Space Rosetta’s ‘rubber ducky’ comet makes closest approach to Earth, will disappear for 200 years Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. + eight = 9