반응형 전체 글27 천체 관측 가이드 소개 천문관측 가이드 별을 향한 여행 우리는 신비와 아름다움으로 가득 찬 무한한 우주에 둘러싸여 있습니다. 별, 행성, 다양한 천체는 우리를 놀라게 할 뿐만 아니라 생각하게 만듭니다. 이 가이드는 아마추어 천문학자로서 별 관찰의 기본을 가르치고 매혹적인 천체를 발견하는 방법을 보여줍니다. 1. 망원경과 렌즈의 선택 천문학 관찰을 시작하려면 올바른 망원경을 선택하는 것이 중요합니다. 초보자에게는 작은 광학 망원경이나 쌍안경이 적합할 수 있습니다. 점차적으로 더 큰 광학 장치로 전환할 수 있습니다. 할인 코드 복사 ### 광학 망원경 - **유형**: 광학 망원경에는 크기와 목적에 따라 다양한 종류가 있습니다. - *굴절 망원경*: 렌즈를 사용하여 빛의 초점을 맞추는 일반적인 망원경입니다. - *반사 망원경*: .. 2023. 11. 27. Monthly Federal funds effective rate in the United States from July 1954 to February 2023 The U.S. federal funds effective rate was drastically lowered between February and April 2020. It dropped from 1.58 percent in February that year, down to 0.65 in March, and further down to 0.05 in April. The lowered rate was a response to the COVID-19 pandemic, as with the reason for the Federal Reserve’s quantitative easing during the same period. After several slight changes in the effective .. 2023. 3. 30. Premier League titles won from 1889 to 2022, by club Manchester United are currently the record title winners in the English top flight having won the division a total of 20 times since 1889. Most of these wins came after the inception of the Premier League at the start of the 1992/93 season under the leadership of manager Sir Alex Ferguson. Indeed, United’s most recent title came in the 2012-13 season, which was Ferguson's final season of managem.. 2023. 3. 28. Most popular social networks worldwide as of January 2023, ranked by number of monthly active users What is the most popular social media platform worldwide? Market leader Facebook was the first social network to surpass one billion registered accounts and currently sits at more than 2.9 billion monthly active users. Meta Platforms owns four of the biggest social media platforms, all with over one billion monthly active users each: Facebook (core platform), WhatsApp, Facebook Messenger, and In.. 2023. 3. 28. 이전 1 2 3 4 5 ··· 7 다음 728x90 반응형
