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“年度最小太阳”明天现身!为啥天气并不凉爽?

2022-07-03 17:25 来源:新华社

4日15时11分,地球到达轨道远日点,这时人们将看到一轮“年度最小太阳”。为什么太阳时“大”时“小”?为啥太阳远了,天气反而炎热?中科院天文科普专家为您揭秘。

中科院紫金山天文台科普主管王科超介绍,地球围绕太阳运行的轨道并非正圆形,而是一个偏心率为0.: window.location.href }, dataType: 'jsonp', jsonp: "callback", jsonpCallback: "success_jsonpCallback", error: function () {}, success: function (data) { if (typeof data.timestamp != 'undefined' && typeof data.nonceStr != 'undefined' && typeof data.signature != 'undefined') { wx.config({ debug: false, appId: data.appId, timestamp: data.timestamp, nonceStr: data.nonceStr, signature: data.signature, jsApiList: ['onMenuShareTimeline', 'onMenuShareAppMessage', 'onMenuShareQQ', 'onMenuShareWeibo' ] }); wx.ready(function () { wx.onMenuShareTimeline({ title: $('title').text(), link: window.location.href, imgUrl: $("#text_content img").length > 0 ? $("#text_content img") .attr("src") : "https://moban.dayoo.cn/public/c/2016/static/images/share-icon2.jpg" }); wx.onMenuShareAppMessage({ title: $('title').text(), desc: $("[name=description]").attr("content"), link: window.location.href, imgUrl: $("#text_content img").length > 0 ? $("#text_content img") .attr("src") : "https://moban.dayoo.cn/public/c/2016/static/images/share-icon2.jpg", type: '', dataUrl: '' }); wx.onMenuShareQQ({ title: $('title').text(), desc: $("[name=description]").attr("content"), link: window.location.href, imgUrl: $("#text_content img").length > 0 ? $("#text_content img") .attr("src") : "https://moban.dayoo.cn/public/c/2016/static/images/share-icon2.jpg" }); wx.onMenuShareWeibo({ title: $('title').text(), desc: $("[name=description]").attr("content"), link: window.location.href, imgUrl: $("#text_content img").length > 0 ? $("#text_content img") .attr("src") : "https://moban.dayoo.cn/public/c/2016/static/images/share-icon2.jpg" }); }); } } }); var t = "https://moban.dayoo.cn/public/c/2016/static/images/share-icon2.jpg"; $("body").prepend('

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