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1 thought on “How do Venus and Mercury act as Morning and Evening star?”
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  1. You might also be interested in:
  2. Rise of the Evening Star
  3. The 'Evening Star' is Back: How to Spot Venus | Space
  4. See a Problem?
  5. Evening Star

Seen in a North-up orientation, the teapot appears 'tipped up', pouring its contents South-westwards into neighbouring Scorpius. Venus then sets at its most Southerly point along the local horizon, an effect which is more pronounced the further away from the Equator an observer is situated. It is best seen at dusk from a narrow band of the Earth stretching from South-eastern China through the Philippines, Eastern Indonesia and Eastern Australia. Iit has an apparent diameter of 24' and its integrated magnitude i.

It is just visible to the naked-eye from dark sites, is easily seen through binoculars and is beautifully resolved in telescopes. Over the next week Venus passes North of the four stars which form the 'handle' of the Teapot. Venus will occult pass in front of Albaldah during its morning apparition in View from. North up. Oct Nov 5. Nov Dec 5.

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Dec Jan 4. Jan Feb 3. Feb Mar 4.

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Mar Apr 3. Apr May 3. May Table of selected data relating to the evening apparition of Venus during The data is listed at day intervals, corresponding with the dates shown in bright white on the star charts 1 and 2. The ringed planet is in the final weeks of its apparition and, being very distant and small, is not seen at its best at this time. Its rings are however nicely open and measure 34" across, the globe of the planet measuring 15" across. Saturn mag. They were named as such by Claudius Ptolemy ca. Prima Giedi and Algedi are separated in the night sky by 6'. Telescopes and Binoculars for Astronomy.

Orion GoScope. Mini Giant. Giant View. Buy at. Associates Programme, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon. It is however only viewable from a sparsely populated region of the world comprising the Southernmost tip of South America and the Antarctic.

Details of the timings and track of visibility can be seen by following the link in the Moon near Venus Dates section below.

Rise of the Evening Star

Rey On older star maps, such as the Uranographia published in by Johann Elert Bode , these stars marked the amphora from which the water was poured. Around mid-January, observers in Southern Tropical latitudes see Venus reach its highest altitude after sunset for the current evening apparition.

T he paths of Venus and Mercury through the zodiac constellations during the latter part of Venus' evening apparition in click on the thumbnail for the full-size image. The earlier part of the apparition appears in the star chart above. Planet positions are plotted for 0 hrs Universal Time UT at 5-day intervals.

For Venus, apparition data for the dates shown in bright white at day intervals are included in the table above. Hence Mercury's evening apparition draws to a close in mid-February It then becomes lost from view in the evening twilight as it heads towards inferior conjunction with the Sun. The planet re-emerges in the dawn twilight in early March for a morning apparition which lasts through to mid-April. Because Mercury is only ever seen in twilight, many of the fainter stars shown in the planet's vicinity may not be visible when the planet itself is observed.

Printer-friendly versions of this chart are available for Northern and Southern hemisphere views.


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The four star names shown in yellow-green were officially adopted by the I nternational Astronomical Union IAU in At the Eastern edge of the 'wheel' asterism is Aqr Eta Aquarii, mag. Neptune entered Aquarius in and will remain there until The planet crosses to the North of the celestial equator on February 8th, when its declination changes from negative to positive.

The 'Evening Star' is Back: How to Spot Venus | Space

In early February Venus is joined by Mercury approaching from the West, in the second paired apparition of the evening apparition. This particular apparition of Mercury favours Northern hemisphere observers, since from here the ecliptic presents a steep angle to the Western horizon after sunset at this time of year.

Solar System /Venus, the Morning Star and Evening Star

At this point in the apparition the distance between Venus and the Earth is reducing at an average rate of about 1. The unsteady 'boiling' effect of the planet is caused by turbulence in the Earth's atmosphere. T he name was formerly standardized by the IAU in , the original name having been Torcularis Septentrionalis. Later that same day, Venus enters Aries.

Venus ' passage through this small constellation is an eventful one, involving a planetary conjunction, a significant orbital position passage and a maximum solar elongation. The exoplanet is the equivalent of 1.

The planet's passage through perihelion at this moment in time is significant for Northern hemisphere observers for a reason which will be explained shortly. The name was formally recognised by the IAU in and it first appeared in a star catalogue compiled by the French astronomer Nicolas-Louis de Lacaille Venus in the Western Sky at dusk, photographed by the writer during the planet's evening apparition in January Venus had recently passed greatest elongation and shone at magnitude A t around 15 hours UT on the following day 23rd the distance between the Earth and Venus is the same as that between the Sun and Venus , at 0.

At latitudes South of the Southern Tropics the planet's altitude at any given period after sunset has reduced considerably since the optimal period in December.


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For a few days around greatest elongation, telescopic observers often attempt to determine the precise date of dichotomy. It is the moment when the terminator the line separating the light and dark sides of the planet appears perfectly straight, essentially dividing Venus into two perfect halves. Solar System geometry suggests that this should occur on greatest elongation day, however it often does not and the precise reason for this was not understood until quite recently. Observers often report the straight terminator a few days earlier or later than the greatest elongation date early in evening apparitions and late in morning apparitions.

The phenomenon is thought to be due to Venus ' dense atmosphere scattering the sunlight. Blue light scatters more readily than red light which is why the sky on Earth appears blue and this effect is also seen on Venus when it is observed using coloured eyepiece filters. For Northern hemisphere observers the date of Venus ' maximum solar elongation in is ideal, since it coincides with the period during which the planet attains its highest position above the local horizon after sunset.

Higher latitudes do not fare much worse. In addition, Venus ' passage through perihelion only a few days earlier means that it is slightly brighter than normal at this point. For the naked-eye planet observer situated at mid- and high-Northern latitudes, Venus ' apparition is the best evening apparition in the planet's apparition 'cycle' there being five evening and five morning apparitions in each Venusian 8-year 'Cycle'. In contrast, for Equatorial and Southern hemisphere observers it is the worst evening apparition in the 'cycle'. Because of the planet's glare when seen against a darkening sky, coupled with the Earth's troublesome atmospheric turbulence at low altitudes, most experienced telescope users observe the planet in full daylight, when it is high above the horizon and more easily seen against a brighter sky.

Greatest elongation day having passed, Venus begins to show a crescent phase through telescopes, its apparent size continuing to enlarge slightly with each passing day. From April 3rd to 4th the planet passes South of the open star cluster known as the Pleiades or M Also known by the name The Seven Sisters , they are probably the best-known star cluster in the night sky. Under dark skies the seven brightest stars in the group can be seen with the naked-eye; they are Alcyone Tauri or Eta Tauri , mag.

It appears to be part of the cluster but i n fact, it is not a physical member of the Hyades group; its appearance in the cluster is purely a line-of-sight effect. Positioned at the 'bend' of the Bull's Northern horn, it is a multiple-star system and a member of an obscure open star cluster known as Alessi As Venus proceeds towards the North-eastern corner of Taurus , its apparent motion against the background stars is slowing.

Venus attains its greatest brilliancy for this apparition mag. Greatest brilliancy occurs when the percentage of the illuminated portion of the disk phase and its angular size combine to best visual effect. Across the world, t he planet now sets at its most Northerly point along the local horizon. H ereafter Venus moves retrograde against the background stars, its declination and ecliptic latitude reducing as it accelerates towards the close of the apparition.

From around mid-May, steadily-held binoculars begin to detect Venus as a tiny crescent soon after sunset as the planet languishes low in the WNW sky.

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The crescent appears greatly disturbed by the Earth's turbulent atmosphere and is split into the r a i n b o w colours by an effect called dispersion an example of how dispersion appears through a telescope can be seen here. This is Mercury 's second evening apparition of and its third overall there having been a morning apparition in-between.

As the Venusian crescent continues to enlarge it also becomes more slender, such that the dark non-illuminated side of the planet is well-displayed when seen from the Earth. Telescopic observers now begin their search for the mysterious and elusive Ashen Light , a faint glowing of the night side of Venus which until recently had no clear explanation. Whilst this may seem extraordinary, the planet's apparent size of around 57" brings it very close to the generally-accepted resolution of the human eye, i.

By the end of May Venus becomes lost from view from all locations as it speeds towards inferior conjunction passing between the Earth and the Sun on June 3rd. Venus Conjunctions with other Planets in Not all planetary conjunctions will be visible from the Earth, however, because many of them take place too close to the Sun.

Furthermore, not all of them will be seen from across the world; the observers' latitude will affect the altitude angle above the horizon at which the two planets are seen at the time of the event and the local season will affect the sky brightness at that particular time.

Evening Star

A flat, unobstructed horizon will normally be required to observe most of them. Jupit e r is affected to a much lesser extent since it is always above magnitude A Conjunction of Jupiter and Venus in the dusk sky, photographed by the writer in March A significant factor in determining whether a planetary conjunction is 'easy' or 'difficult' is the altitude that the fainter planet is positioned as it comes into view in the dusk twilight.

This in turn affects the duration for which the pair are visible thereafter. In this context, the six planetary conjunctions of will now be discussed. Even when the solar elongation is favourable, a further problem beckons in that the glare caused by Venus ' brilliance makes it difficult to see the much fainter planet beside it.