{"id":27026,"date":"2021-12-16T00:00:00","date_gmt":"2021-12-16T00:00:00","guid":{"rendered":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/?post_type=purple_issue&#038;p=27026"},"modified":"2022-01-11T15:56:32","modified_gmt":"2022-01-11T15:56:32","slug":"the-planets-4","status":"publish","type":"post","link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/2021\/12\/16\/the-planets-4\/","title":{"rendered":"The planets"},"content":{"rendered":"\n<p class=\"has-text-align-center intro\">Our celestial neighbourhood in January<\/p>\n\n<h4 class=\"article-subhead\"><strong>PICK OF THE MONTH: Venus<\/strong><\/h4>\n\n<p class=\"article-full-body sans-serif\"><strong>Best time to see:<\/strong> 31 January, 07:00 UT Altitude: 9\u02da (low)<br><strong>Location: <\/strong>Sagittarius <br><strong>Direction: <\/strong>Southeast <br><strong>Features: <\/strong>Phase, faint shaded markings. <br><strong>Recommended equipment: <\/strong>75mm, or larger<\/p>\n\n<div class=\"no-tts wp-block-image article-in-image photo\"><figure class=\"no-tts aligncenter\"><img loading=\"lazy\" width=\"1579\" height=\"991\" src=\"https:\/\/dj9jqhxgw9833.cloudfront.net\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef.jpg\" alt=\"\" class=\"no-tts wp-image-27021\" srcset=\"https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef.jpg 1579w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef-300x188.jpg 300w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef-1024x643.jpg 1024w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef-768x482.jpg 768w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef-1536x964.jpg 1536w\" sizes=\"(max-width: 1579px) 100vw, 1579px\" \/><figcaption>Venus will appear as a 2%-lit crescent on 1 Jan, and will increase to 14%-lit on the 31 Jan <\/figcaption><\/figure><\/div>\n\n<p class=\"article-full-body sans-serif\">Venus is in its crescent phase this month. You might be fortunate enough to catch the planet in the evening sky right at the month\u2019s start, but it\u2019s heading for inferior conjunction on 9 January so you don\u2019t have long. On the 1st, a telescope will show Venus as a slender 2%-lit crescent, a remarkable sight if you have clear skies. Being thin and low in altitude, this crescent is susceptible to the unstable atmosphere we have to look through for objects close to the horizon, so plan to catch it as early as you can after sunset. As ever, be safe when hunting for Venus and make sure the Sun is below the horizon before looking for it. If you\u2019re more experienced, it is possible to locate Venus during the day when the Sun is up, but as it\u2019s getting close to the Sun now, this is not recommended unless you know what you\u2019re doing.<\/p>\n\n<p class=\"article-full-body sans-serif\">Following inferior conjunction on the 9th, Venus rapidly re-emerges into <span>The planets in January<\/span> the morning sky, greatly assisted by the planet being north of the ecliptic plane \u2013 the plane of Earth\u2019s orbit around the Sun, which also marks out the apparent path of the Sun against the background stars.<\/p>\n\n<div class=\"no-tts wp-block-image article-in-image photo\"><figure class=\"no-tts aligncenter\"><img loading=\"lazy\" width=\"613\" height=\"613\" src=\"https:\/\/dj9jqhxgw9833.cloudfront.net\/uploads\/sites\/77\/2021\/12\/b5bfb433-678f-4f2a-a611-b9d0435ecabf.jpg\" alt=\"\" class=\"no-tts wp-image-27022\" srcset=\"https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/b5bfb433-678f-4f2a-a611-b9d0435ecabf.jpg 613w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/b5bfb433-678f-4f2a-a611-b9d0435ecabf-300x300.jpg 300w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/b5bfb433-678f-4f2a-a611-b9d0435ecabf-150x150.jpg 150w\" sizes=\"(max-width: 613px) 100vw, 613px\" \/><figcaption> As a thin crescent, Venus is an incredible sight through a telescope<\/figcaption><\/figure><\/div>\n\n<p class=\"article-full-body sans-serif\">On 14 January, a telescope will reveal Venus as a 1%-lit crescent, 1 arcminute across. This is at the limit of resolution for the human eye. On this date the planet rises an hour before the Sun. By the <span>14%-lit, its apparent diameter having shrunk to 49 arcseconds. Observing Venus will have <\/span>time the end of the month has arrived, the phase of Venus will have increased to <span>become a little easier too, the planet now rising 135 minutes before the Sun.<\/span><\/p>\n\n<hr class=\"no-tts wp-block-separator is-style-wide\"\/>\n\n<h4 class=\"article-subhead\"><strong>Mercury<\/strong><\/h4>\n\n<p class=\"article-full-body sans-serif\"><strong>Best time to see: <\/strong>7 January, 30 minutes after sunset <br><strong>Altitude: <\/strong>8\u02da (low)<br><strong>Location:<\/strong> Capricornus <br><strong>Direction: <\/strong>Southwest Mercury shines at mag. \u20130.7 in the evening twilight at the month\u2019s start when it sets, with Venus, about 80 minutes after sunset. It reaches greatest eastern elongation on the 7th, setting 100 minutes after the Sun, but dimming to mag. \u20130.5. The dimming continues and on the 13th, now shining at mag. +0.4, Mercury appears 3.4\u02da from mag. +0.9 Saturn.<\/p>\n\n<h4 class=\"article-subhead\"><strong>Mars<\/strong><\/h4>\n\n<p class=\"article-full-body sans-serif\"><strong>Best time to see:<\/strong> 31 January, 07:15 UT Altitude: 6\u02da (low)<br><strong>Location: <\/strong>Sagittarius <br><strong>Direction:<\/strong> Southeast Mars is a morning planet at the start of 2022, rising two hours before the Sun on the 1st when mag. +1.5 Mars lies 5.5\u02da from its sky rival Antares (Alpha (\u03b1) Scorpii). This offers a good opportunity to compare the planet with its mag. +1.0 stellar rival; the name Antares means \u2018rival of Mars\u2019. Mars never gains much altitude under January\u2019s brightening dawn.<\/p>\n\n<h4 class=\"article-subhead\"><strong>Jupiter<\/strong><\/h4>\n\n<p class=\"article-full-body sans-serif\"><strong>Best time to see:<\/strong> 1 January, 17:00 UT <br><strong>Altitude: <\/strong>23\u02da<br><strong>Location:<\/strong> Aquarius <br><strong>Direction:<\/strong> South-southwest Jupiter is a bright evening planet, visible from 17:00 UT at January\u2019s start, 23\u02da above the south-southwest horizon. It shines at mag. \u20132.0. A waxing crescent Moon passes near Jupiter on the evenings of the 5th and 6th. By the end of January, Jupiter appears against the dusk twilight as its evening observational window draws to a close.<\/p>\n\n<h4 class=\"article-subhead\"><strong>Saturn<\/strong><\/h4>\n\n<p class=\"article-full-body sans-serif\"><strong>Best time to see:<\/strong> 1 January, <span>17:00 UT<\/span><br><strong>Altitude: <\/strong>12\u02da <br><strong>Location: <\/strong>Capricornus <br><strong>Direction: <\/strong>Southwest Saturn is an evening planet, but not well placed, affected by the evening post-sunset twilight glow. Mag. +0.9 Saturn is joined by mag. \u20130.6 Mercury and a thin 5%-lit waxing crescent Moon on 4 January. Look for the trio 80 minutes after sunset. Venus is there too, but closer to the Sun. Jupiter completes the line-up, following 19\u02da to the east. Mercury appears 3.6\u02da from Saturn on the 14th. On this date Mercury and Saturn appear similar in brightness.<\/p>\n\n<h4 class=\"article-subhead\"><strong>Uranus<\/strong><\/h4>\n\n<p class=\"article-full-body sans-serif\"><strong>Best time to see:<\/strong> 1 January, 20:00 UT <br><strong>Altitude: <\/strong>52\u02da<br><strong>Location:<\/strong> Aries <br><strong>Direction: <\/strong>South Uranus is well placed at the month\u2019s start, reaching over 50\u02da altitude when due south, as seen from the UK\u2019s centre. But the planet\u2019s visibility degrades towards the month\u2019s end. Uranus shines on the edge of naked-eye visibility at mag. +5.7 in southern Aries.<\/p>\n\n<h4 class=\"article-subhead\"><strong>Neptune<\/strong><\/h4>\n\n<p class=\"article-full-body sans-serif\"><strong>Best time to see:<\/strong> 1 January, 18:15 UT <br><strong>Altitude: <\/strong>30\u02da<br><strong>Location:<\/strong> Aquarius <br><strong>Direction: <\/strong>South-southwest On the 1st, mag. +7.9 Neptune is about 30\u02da above the south-southwest horizon as darkness falls. By the month\u2019s end, this value will have decreased to 15\u02da. Optical assistance is required to spot Neptune, the minimum equipment being binoculars.<\/p>\n\n<section class=\"wp-block-uagb-section uagb-section__wrap uagb-section__background-undefined uagb-block-c391b8b9-d4e6-4345-a679-57c126ea4661 article-boxout\"><div class=\"uagb-section__overlay\"><\/div><div class=\"uagb-section__inner-wrap\">\n<p class=\"article-full-body sans-serif\">More <strong>ONLINE <\/strong><\/p>\n\n\n\n<p class=\"article-full-body sans-serif\"><strong>Print out observing forms for recording planetary events<\/strong><\/p>\n<\/div><\/section>\n\n<h4 class=\"has-text-align-center article-subhead\">The planets in January<\/h4>\n\n<p class=\"has-text-align-center article-full-body sans-serif\"><strong>The phase and relative sizes of the planets this month. Each planet is shown with south at the top, to show its orientation through a telescope<\/strong><\/p>\n\n<figure class=\"no-tts wp-block-image alignfull article-in-image bild\"><img loading=\"lazy\" width=\"2048\" height=\"610\" src=\"https:\/\/dj9jqhxgw9833.cloudfront.net\/uploads\/sites\/77\/2021\/12\/42214aca-5dfd-4c83-8f55-12f8ff57bc32.jpg\" alt=\"\" class=\"no-tts wp-image-27023\" srcset=\"https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/42214aca-5dfd-4c83-8f55-12f8ff57bc32.jpg 2048w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/42214aca-5dfd-4c83-8f55-12f8ff57bc32-300x89.jpg 300w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/42214aca-5dfd-4c83-8f55-12f8ff57bc32-1024x305.jpg 1024w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/42214aca-5dfd-4c83-8f55-12f8ff57bc32-768x229.jpg 768w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/42214aca-5dfd-4c83-8f55-12f8ff57bc32-1536x458.jpg 1536w\" sizes=\"(max-width: 2048px) 100vw, 2048px\" \/><\/figure>\n\n<h4 class=\"has-text-align-center article-subhead\"><strong>Jupiter&#8217;s moons: <\/strong>January<\/h4>\n\n<p class=\"has-text-align-center article-full-body sans-serif\">Using a small scope you can spot Jupiter\u2019s biggest moons. Their positions change dramatically during the month, as shown on the diagram. The line by each date represents 00:00 UT.<\/p>\n\n<div class=\"no-tts wp-block-image article-in-image infographic\"><figure class=\"no-tts aligncenter is-resized\"><img loading=\"lazy\" src=\"https:\/\/dj9jqhxgw9833.cloudfront.net\/uploads\/sites\/77\/2021\/12\/c9fe1896-fff8-4e46-b33f-2067f20cb5a0.jpg\" alt=\"\" class=\"no-tts wp-image-27025\" width=\"442\" height=\"1024\" srcset=\"https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/c9fe1896-fff8-4e46-b33f-2067f20cb5a0.jpg 884w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/c9fe1896-fff8-4e46-b33f-2067f20cb5a0-129x300.jpg 129w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/c9fe1896-fff8-4e46-b33f-2067f20cb5a0-442x1024.jpg 442w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/c9fe1896-fff8-4e46-b33f-2067f20cb5a0-768x1779.jpg 768w, https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/c9fe1896-fff8-4e46-b33f-2067f20cb5a0-663x1536.jpg 663w\" sizes=\"(max-width: 442px) 100vw, 442px\" \/><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Our celestial neighbourhood in January<\/p>\n","protected":false},"author":24,"featured_media":27021,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ub_ctt_via":"","purple_page_number":"48","purple_custom_meta_purple_page_number":"48","purple_seq_number":"1","purple_custom_meta_purple_seq_number":"1","purple_source_article":"article_48-1.xml","purple_custom_meta_purple_source_article":"article_48-1.xml","purple_source_issue":"January-2022","purple_custom_meta_purple_source_issue":"January-2022","purple_external_id":"January-2022-48-1","purple_custom_meta_purple_external_id":"January-2022-48-1","purple_issue_code":"|0000086548||","purple_custom_meta_purple_issue_code":"|0000086548||","purple_android_product":"com.im.skyatnight.200","purple_custom_meta_purple_android_product":"com.im.skyatnight.200","purple_ios_product":"com.im.skyatnight.200","purple_custom_meta_purple_ios_product":"com.im.skyatnight.200","purple_web_product":"","purple_custom_meta_purple_web_product":"","purple_publication_id":"075fab74-0a21-4201-866a-899d6c41c40c","purple_migrated":"","kt_blocks_editor_width":""},"categories":[22],"tags":[14],"featured_image_src":"https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef.jpg","author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/author\/importmanagerhubsprylab-com\/"},"acf":{"readingTimeMinutes":"5","apple_news_title":""},"uagb_featured_image_src":{"full":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef.jpg",1579,991,false],"thumbnail":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef-150x150.jpg",150,150,true],"medium":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef-300x188.jpg",300,188,true],"medium_large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef-768x482.jpg",768,482,true],"large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef-1024x643.jpg",800,502,true],"1536x1536":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef-1536x964.jpg",1536,964,true],"2048x2048":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2021\/12\/9520c3b9-1321-4d3c-9362-84d7ee7f05ef.jpg",1579,991,false]},"uagb_author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/author\/importmanagerhubsprylab-com\/"},"uagb_comment_info":0,"uagb_excerpt":"Our celestial neighbourhood in January","_links":{"self":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts\/27026"}],"collection":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/comments?post=27026"}],"version-history":[{"count":4,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts\/27026\/revisions"}],"predecessor-version":[{"id":27691,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts\/27026\/revisions\/27691"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media\/27021"}],"wp:attachment":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media?parent=27026"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/categories?post=27026"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/tags?post=27026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}