将下面的短文编辑成更加简练的版本。 
短文：On the occasion of the 50th anniversary of the lunar landing, we invite you to join us for a special event at the museum, celebrating the achievements of NASA’s Apollo missions. The event will include a lecture by a former astronaut, a guided tour of our current Space exhibit, and a screening of the documentary “Apollo 11: First Steps Edition”.
简洁版：为庆祝登月50周年，我们邀请您参加博物馆的特别活动。活动包括前宇航员的讲座、现有太空展览的导览和纪录片《阿波罗11：第一步版》的放映。