<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><div><section id="ember953" class="ember-view collapsible opened" style="box-sizing: border-box; max-height: none; overflow-y: hidden;"><div class="text" style="box-sizing: border-box; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;"><div><section id="ember951" class="ember-view collapsible opened" style="box-sizing: border-box; max-height: none; overflow-y: hidden;"><div class="text" style="box-sizing: border-box;"><div class="type-image dnd-atom-wrapper context-full_width" style="box-sizing: border-box; clear: both; display: table; margin: 0px auto 2em;"><div class="dnd-drop-wrapper" style="box-sizing: border-box;"><a href="https://www.nasa.gov/sites/default/files/thumbnails/image/361_45p_22_12c.jpg" style="box-sizing: border-box; color: rgb(66, 139, 202); text-decoration: none; font-size: 15px; background-position: 0px 0px;" class=""></a></div><div class="dnd-legend-wrapper" style="box-sizing: border-box;"><div class="caption" style="box-sizing: border-box;"><span style="font-size: 15px;" class="">Comet 45P/Honda-Mrkos-Pajdušáková is captured using a telescope on December 22 from Farm Tivoli in Namibia, Africa.</span></div><div class="credits" style="box-sizing: border-box; font-style: italic; font-weight: 700;"><span style="font-size: 15px;" class="">Credits: Gerald Rhemann</span></div><div class="link" style="box-sizing: border-box; background-image: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-size: inherit; padding: 0px;"></div></div></div><p style="box-sizing: border-box; margin: 0px 0px 15px; -webkit-font-smoothing: inherit; line-height: 1.4em;" class=""><font size="4" class="">Discovered in 1948, 45P is a short-period comet, with an orbit that takes it around the sun and out by Jupiter about every 5-1/4 years. This weekend’s encounter will be the comet’s closest with Earth through the end of this century. The comet will pass by our planet again in 2032 but will be much farther away – at a distance of nearly 30 million miles (about 48 million kilometers). Scientists have taken advantage of 45P’s approach, making observations using powerful ground-based telescopes such as NASA’s Infrared Telescope Facility to investigate the gases, dust and ice particles that are released from the comet nucleus and show up in the coma and tail. By looking for water, methane and other important compounds, astronomers get clues about how the comet is put together and where it originated in the cloud of material that surrounded the young sun as the solar system formed. By observing the same comet more than once, astronomers can see how the object changes over time. “Observing a comet multiple times over successive orbits is like taking snapshots at different stages of life,” said Joseph Nuth, a senior scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “And some comets have harder lives than others, depending on how close they get to the sun. We can learn about these effects by comparing different comets with varying perihelion distances over time.” Ground-based observations also are planned for comet 41P/Tuttle-Giacobini-Kresak, which will pass closest to Earth on April 1, 2017, and for comet 46P/Wirtanen, passing closest to Earth on Dec. 16, 2018. By studying this trio of comets, astronomers can learn more about the differences among comets – information they use to fill in the comet family tree. “Comet 46P in particular will remain within 10 million miles of Earth for several weeks, from December 4 through 28, 2018,” said Goddard researcher Michael DiSanti. “This will permit detailed studies of its material, as successive regions of the comet’s nucleus become exposed to sunlight. View 45P on Gerald Rhemann's page: <a href="http://www.astrostudio.at/2_Bright%20Comets.php?img=images/2_Bright%20Comets/361_45P_22_12C.jpg" style="box-sizing: border-box; color: rgb(66, 139, 202); text-decoration: none; background-position: 0px 0px;" class="">www.astrostudio.at/2_Bright%20Comets.php?img=images/2_Bright%20Comets/361_45P_22_12C.jpg</a> Comet 45P was featured recently in Astronomy Photo of the Day:<a href="https://apod.nasa.gov/apod/ap170102.html" style="box-sizing: border-box; color: rgb(66, 139, 202); text-decoration: none; background-position: 0px 0px;" class=""> https://apod.nasa.gov/apod/ap170102.html</a></font></p><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><span style="font-size: 20px;" class=""><b class="">For those of you who may not seen the moon last night….it was amazing </b></span></div><div class=""></div></div></section></div></div></section></div></body></html>