--- description: Stephen Colbert interviews Neil DeGrasse Tyson about Pluto and the NASA New Horizons spacecraft flying by it. title: Watch Neil deGrasse Tyson Tell Stephen Colbert Why He's Not Impressed by Pluto image: https://static.time.com/v3/assets/bltea6093859af6183b/bltde093bcdab65f2d0/6988d9b9bc6cfc69913e2a3c/time-logo.jpg?branch=production --- * [Newsfeed](/tag/time-section-newsfeed/) ## Newsfeed Update your preferences in [Account Settings](/account/preferences/) Close # Watch Neil deGrasse Tyson Tell Stephen Colbert Why He's Not Impressed by Pluto  by [Olivia B. Waxman](/author/olivia-b-waxman/)  ## Olivia B. Waxman Update your preferences in [Account Settings](/account/preferences/) Close Staff Writer Jul 15, 2015 4:28 PM CUT  by [Olivia B. Waxman](/author/olivia-b-waxman/)  ## Olivia B. Waxman Update your preferences in [Account Settings](/account/preferences/) Close Staff Writer Jul 15, 2015 4:28 PM CUT In the latest clip from _The Late Show with Stephen Colbert_‘s YouTube channel, Stephen Colbert describes Pluto as “a malted milk ball left in the rain 4.7 billion miles from the sun” based on photos that NASA New Horizons spacecraft took during its flyby this week. He interviews Neil deGrasse Tyson, who says he is not as impressed by the news because the recent space mission proves Pluto is not as big as we thought — to which Colbert calls him “Neil _Blasé_ Tyson.” The comedian also refers to Pluto’s moon Charon as a “girlfriend,” and then offers deGrasse Tyson some Tang and a Klondike bar. ### See 13 Stephen Colbert Cameos You Might Have Missed  The Hobbit: The Desolation of Smaug - Lake-town Spy Todd Eyre—Warner Bros.  Exit 57 - Various Characters (pictured top left) Comedy Central  Dana Carvey Show - Various Characters ABC  Strangers With Candy - Chuck Noblet Comedy Central  Missing Persons - Chet Davies ABC  Saturday Night Live - Ace, The Ambiguously Gay Duo (pictured left) NBC  Spin City - Frank ABC  Simpsons - Colby Krause (pictured right) Fox  Curb Your Enthusiasm - Tourist HBO  American Dad! - Dr. R. Dandliker (pictured left) Fox  Bewitched - Stu Robinson (pictured left) Columbia  Mr. Peabody & Sherman - Paul Peterson 20th Century Fox  Monsters vs Aliens - President Hathaway Dreamworks ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/3958683/stephen-colbert-pluto-new-horizons/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/3958683/stephen-colbert-pluto-new-horizons/"},"headline":"Watch Neil deGrasse Tyson Tell Stephen Colbert Why He's Not Impressed by Pluto","datePublished":"2015-07-15T16:28:49.000Z","dateModified":"2026-05-11T04:47:15.591Z","description":"While drinking Tang and eating ice cream","url":"https://time.com/3958683/stephen-colbert-pluto-new-horizons/","keywords":["Newsfeed","celebrities"],"thumbnailUrl":"","author":[{"@type":"Person","name":"Olivia B. Waxman","jobTitle":"Staff Writer","url":"https://time.com/author/olivia-b-waxman/"}],"articleSection":"","image":[],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/tag/time-section-newsfeed/","name":"Newsfeed"}},{"@type":"ListItem","position":2,"item":{"@id":"https://time.com/3958683/stephen-colbert-pluto-new-horizons/","name":"Watch Neil deGrasse Tyson Tell Stephen Colbert Why He's Not Impressed by Pluto"}}]},{"@context":"https://schema.org","@type":"VideoObject","name":"NASA Celebrates Historic Pluto Mission","description":"NASA is celebrating an historic first mission to Pluto as the world anxiously awaits more images of the dwarf planet.","thumbnailUrl":"https://cdn.jwplayer.com/v2/media/WkGiVtGO/poster.jpg?width=720","uploadDate":"2015-07-15T16:31:29.000Z","contentUrl":"https://cdn.jwplayer.com/manifests/WkGiVtGO.m3u8","embedUrl":"https://time.com/3958683/stephen-colbert-pluto-new-horizons/","duration":"PT1M36S","potentialAction":{"@type":"SeekToAction","target":"https://time.com/3958683/stephen-colbert-pluto-new-horizons/?jw_start={seek_to_second_number}","startOffset-input":"required name=seek_to_second_number"}}] ```