Solar Orbiter: Closest ever pictures taken of the Sun

太阳轨道探测器:有史以来最接近太阳的照片

The arrow points to a “camp fire”. The circle at bottom-left gives an indication of size

箭头指向“篝火”。 左下角的圆圈表示尺寸

New pictures of the Sun taken just 77 million km (48 million miles) from its surface are the closest ever acquired by cameras.

新拍摄的太阳照片距离太阳表面只有7700万公里(4800万英里),这是有史以来相机拍到的最近的一张。

They come from the European Space Agency’s Solar Orbiter (SolO) probe, which was launched earlier this year.

它来自欧洲航天局今年早些时候发射的太阳轨道探测器(SolO)。

Among the UK-assembled craft’s novel insights are views of mini-flares dubbed “camp fires”.

在英国组装的飞船的新奇视野中,有被称为“营火”的小型耀斑。

These are millionths of the size of the Sun’s giant flares that are routinely observed by Earth telescopes.

这是地球望远镜通常观测到的太阳耀斑的百万分之一。

Whether these miniature versions are driven by the same mechanisms, though, is unclear. But these small flares could be involved in the mysterious heating process that makes the star’s outer atmosphere, or corona, far hotter than its surface.

但是,尚不清楚这些微型版本是否由相同的机制驱动。 但是,这些小耀斑可能参与了神秘的加热过程,该过程使恒星的外部大气或日冕比其表面温度高得多。

“The Sun has a relatively cool surface of about 5,500 degrees and is surrounded by a super-hot atmosphere of more than a million degrees,” explained Esa project scientist Daniel Müller.

Esa项目科学家丹尼尔·穆勒(Daniel Müller)解释说:“太阳表面温度相对较低,约5500度,周围是超过100万度的超高温大气”。

“There’s a theory put forward by the great US physicist Eugene Parker, who conjectured that if you should have a vast number of tiny flares this might account for an omnipresent heating mechanism that could make the corona hot.”

“美国伟大的物理学家尤金·帕克提出了一个理论,他推测,如果你有大量的微小耀斑,这可能是一个无所不在的加热机制,可以使日冕变热。”

Whatever their role, the camp fires are certainly small – which may explain why they’ve been missed up to this point, says David Berghmans, from the Royal Observatory of Belgium and the principal investigator on the probe’s Extreme Ultraviolet Imager (EUI).

比利时皇家天文台和探测器的极端紫外线成像仪(EUI)的首席研究员戴维·伯格曼斯说,无论它们起什么作用,营火肯定很小,这也许可以解释为什么它一直被忽视。

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