Here you can select the time from which the observations will be displayed. The last month will be used by default.
In this case, the search results in the middle of the page will show the findings reported to the Skywarden during the past month.
By clicking on the word 'ends' with the mouse, you will also see the end time of the search period. This is useful in situations where you want to look at observations from a period in the past, such as reports from a particular week in Skywarden.
Especially when looking at observations for a particular time period, you may want to do the search based on when the observed phenomenon actually happened instead of the time when it was sent to the observation database. In that case, you may want to select 'Observed' instead of the default 'Sent'. Please note that the browser uses a cookie to remember your choice of the start time of the search. If you have enabled cookies and do not clear them from your browser's cache, the same browser will display observations from the same time window you last selected the next time you use it.
Please note that the browser uses a cookie to remember your choice of the start time of the search. If you have enabled cookies and do not clear them from your browser's cache, the same browser will display observations from the same time window you last selected the next time you use it.
The "Sent" -option retrieves observations submitted to the Skywarden during the selected time period, regardless of when those phenomena were seen in the sky.
The selection “observed” retrieves the phenomena that appeared in the sky during the selected period, regardless of when they were reported to the Skywarden.
You can choose to show only phenomena of the desired level of visibility in the search results. For example, "at least III" removes the phenomena classified as the weakest (I-II). Similarly, "at least V" removes from the results all but the relatively rare phenomena or those classified as very impressive (V).
Here you can do a free-text search to the observations
The given text will bee searched from observation titles,descriptions, technical details and identified phenomena
You can search for any persons observations by writing the observer's whole name or part of the name here. For example 'John Smith' or 'John S'
You can also performa a search based on asspciation/team name or part of the name, like "Lahden Ursa".The search will bring up observations, that exactly match the given string.
To find observations made in some specific location, type the municipality name to the search field. For example, "Mikkeli"
You can also list multiple locations by separating them with a comma.For example "Mikkeli, Hirvensalmi, Juva, Kangasniemi". In this case, the search will return findings that match the locations listed.
In this field, you can search for more detailed phenomenon identifiers included in the observation details.
Such are, for example, deep space object types such as "spiral galaxy" or "reflection nebula" or halo forms such as "sundog" or "sun pillar".
You can also list multiple types of phenomena by separating them with a comma. A search will bring up findings that match one or more of the terms you listed.
By narrowing down the search date limits and typing, for example, "northern lights", you can see all the northern lights seen within a certain time period.
Copyright © 2016 Samuli Vuorinen. All rights reserved.
Visibility II / V
I photographed this “cosmic hand” two nights this week, three hours on Wednesday, and seven hours yesterday. So a total of ten hours!
Kuvasin tätä "kosmista kättä" kahtena yönä tällä viikolla, kolme tuntia keskiviikkona ja seitsemän tuntia eilen. Yhteensä siis kymmenen tuntia!
Dark nebulae are dust in space. It obsruct the visibility of background star and bright nebulae. Thus, the dark nebulae are seen as dark clouds in space.
The Horsehead Nebula is a dark nebula. Image Arto Murtovaara.
The dark nebula LDN 1235 in Cepheus. Image Juha Kepsu.
The dark nebula LDN 1302. Image Tero Turunen.
The NGC 1333 is a reflection nebula, which includes also dark nebulae. Image Samuli Vuorinen.
Reflection nebula is gas only lit up by nearby stars. It should not be mix up with emission nebula, where hot stars nearby cause the gas glow. But then reflection nebulae are visible in the same areas with emission nebulae. The appearance of reflection nebulae is irregular, and many of them need bigger instruments to be visible.
Reflection nebulae are glowing blue around the stars of Pleyades. Image Juha Parvio.
The blue glowing reflection nebula NGC 1333 around the bright star is in Perseus. Image Timo Inkinen.
The bluish reflection nebula NGC 2023 is located lower left from the Horsehead Nebula. The Horsehead Nebula itself is a dark nebula in the front of red emission nebula IC 434. In the left side there is NGC 2024 aka Flame Nebula. Image Samuli Vuorinen.
NGC 7538 in Cepheus is a combination of reflection and emission nebula. Image Timo Inkinen.
Rflection nebulae (LBN 550, 552 and 555) and dark nebulae (LDN 1228) in Cepheus. Image Juha Kepsu.
Reclection nebula vdB 141 in Cepheus. Image Tero Turunen.
TS Boren-Simon Powernewt 8 "f / 2.8, Atik 460EX, Skywatcher EQ6 and Astrodon LRGB filters. Exposure for a total of 10 hours in 10 minute increments.
Wow, upeaa jälkeä! Värikkäät diffraktiopiikit ovat NIIN hieno yksityiskohta vielä.
Upea kuva ja valotusta kerätty kunnioitettavasti!
Kiitosta vain! :)
Makoisa kuva ja vielä makoisampi käsittely. Tyylikästä jälkeä, dataa on revitty auki juuri oikea määrä eikä yhtään yli tai ali.
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